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54087258281 = 77921238063
BaseRepresentation
bin110010010111110110…
…100001000010101001
312011121102201101221012
4302113312201002221
51341232314231111
640503005353305
73623222052440
oct622766410251
9164542641835
1054087258281
1120a35935761
12a595868835
13513c793454
1428914b9d57
15161860448b
hexc97da10a9

54087258281 has 12 divisors (see below), whose sum is σ = 62606420352. Its totient is φ = 45773628264.

The previous prime is 54087258241. The next prime is 54087258289. The reversal of 54087258281 is 18285278045.

It is a de Polignac number, because none of the positive numbers 2k-54087258281 is a prime.

It is a super-2 number, since 2×540872582812 (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (54087258289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 575345 + ... + 662718.

It is an arithmetic number, because the mean of its divisors is an integer number (5217201696).

Almost surely, 254087258281 is an apocalyptic number.

It is an amenable number.

54087258281 is a deficient number, since it is larger than the sum of its proper divisors (8519162071).

54087258281 is an equidigital number, since it uses as much as digits as its factorization.

54087258281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238228 (or 1238149 counting only the distinct ones).

The product of its (nonzero) digits is 1433600, while the sum is 50.

The spelling of 54087258281 in words is "fifty-four billion, eighty-seven million, two hundred fifty-eight thousand, two hundred eighty-one".

Divisors: 1 7 79 553 6241 43687 1238063 8666441 97806977 684648839 7726751183 54087258281