51161232021507 has 16 divisors (see below), whose sum is σ = 76259414244480. Its totient is φ = 33898239618696.

The previous prime is 51161232021499. The next prime is 51161232021509. The reversal of 51161232021507 is 70512023216115.

51161232021507 is a `hidden beast` number, since 5 + 1 + 1 + 6 + 123 + 2 + 0 + 21 + 507 = 666.

51161232021507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51161232021507 - 2³ = 51161232021499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51161232021509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5812450953 + ... + 5812459754.

It is an arithmetic number, because the mean of its divisors is an integer number (4766213390280).

Almost surely, 2^{51161232021507} is an apocalyptic number.

51161232021507 is a deficient number, since it is larger than the sum of its proper divisors (25098182222973).

51161232021507 is a wasteful number, since it uses less digits than its factorization.

51161232021507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11624910879 (or 11624910873 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 51161232021507 in words is "fifty-one trillion, one hundred sixty-one billion, two hundred thirty-two million, twenty-one thousand, five hundred seven".