51544524321 has 24 divisors (see below), whose sum is σ = 76866416640. Its totient is φ = 33249556800.

The previous prime is 51544524313. The next prime is 51544524347. The reversal of 51544524321 is 12342544515.

51544524321 is a `hidden beast` number, since 5 + 1 + 544 + 52 + 43 + 21 = 666.

It is not a de Polignac number, because 51544524321 - 2³ = 51544524313 is a prime.

It is a super-2 number, since 2×51544524321² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51544524301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3150400 + ... + 3166718.

It is an arithmetic number, because the mean of its divisors is an integer number (3202767360).

Almost surely, 2^51544524321 is an apocalyptic number.

It is an amenable number.

51544524321 is a deficient number, since it is larger than the sum of its proper divisors (25321892319).

51544524321 is a wasteful number, since it uses less digits than its factorization.

51544524321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27677 (or 27674 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

The spelling of 51544524321 in words is "fifty-one billion, five hundred forty-four million, five hundred twenty-four thousand, three hundred twenty-one".