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51555142915309 = 11223607199917321
BaseRepresentation
bin10111011100011100111011…
…11110101101010011101101
320202112121211112220202000001
423232032131332231103231
523224134413041242214
6301352034455104301
713600510334201455
oct1356163576552355
9222477745822001
1051555142915309
1115477460154960
125947895072091
13229c824226147
14ca33d4628d65
155e6103135c74
hex2ee39dfad4ed

51555142915309 has 32 divisors (see below), whose sum is σ = 56618827776000. Its totient is φ = 46555282915200.

The previous prime is 51555142915271. The next prime is 51555142915337. The reversal of 51555142915309 is 90351924155515.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51555142915309 - 27 = 51555142915181 is a prime.

It is a super-2 number, since 2×515551429153092 (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51555142915309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51555142915379) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2976444369 + ... + 2976461689.

It is an arithmetic number, because the mean of its divisors is an integer number (1769338368000).

Almost surely, 251555142915309 is an apocalyptic number.

It is an amenable number.

51555142915309 is a deficient number, since it is larger than the sum of its proper divisors (5063684860691).

51555142915309 is a wasteful number, since it uses less digits than its factorization.

51555142915309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20161.

The product of its (nonzero) digits is 6075000, while the sum is 55.

The spelling of 51555142915309 in words is "fifty-one trillion, five hundred fifty-five billion, one hundred forty-two million, nine hundred fifteen thousand, three hundred nine".

Divisors: 1 11 223 607 1999 2453 6677 17321 21989 135361 190531 445777 1213393 1488971 3862583 4903547 10513847 13347323 34624679 42488413 115652317 270586639 380871469 2344587881 2976453029 7721303417 21017180153 25790466691 84934337587 231188981683 4686831174119 51555142915309