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10505505031 = 71519938983
BaseRepresentation
bin10011100100010110…
…10100100100000111
31000010010221221122221
421302023110210013
5133003402130111
64454241233211
7521223214360
oct116213244407
930103857587
1010505505031
1145010a146a
122052332807
13cb564c188
1471934cb67
15417462371
hex2722d4907

10505505031 has 8 divisors (see below), whose sum is σ = 12085804544. Its totient is φ = 8945083800.

The previous prime is 10505505019. The next prime is 10505505077. The reversal of 10505505031 is 13050550501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10505505031 - 27 = 10505504903 is a prime.

It is a super-2 number, since 2×105055050312 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10505504987 and 10505505005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10505502031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4968435 + ... + 4970548.

It is an arithmetic number, because the mean of its divisors is an integer number (1510725568).

Almost surely, 210505505031 is an apocalyptic number.

10505505031 is a deficient number, since it is larger than the sum of its proper divisors (1580299513).

10505505031 is an equidigital number, since it uses as much as digits as its factorization.

10505505031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9939141.

The product of its (nonzero) digits is 1875, while the sum is 25.

The spelling of 10505505031 in words is "ten billion, five hundred five million, five hundred five thousand, thirty-one".

Divisors: 1 7 151 1057 9938983 69572881 1500786433 10505505031