51643431522 has 16 divisors (see below), whose sum is σ = 114763181280. Its totient is φ = 17214477156.

The previous prime is 51643431509. The next prime is 51643431523. The reversal of 51643431522 is 22513434615.

51643431522 is a `hidden beast` number, since 5 + 1 + 643 + 4 + 3 + 1 + 5 + 2 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (51643431523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 478179868 + ... + 478179975.

It is an arithmetic number, because the mean of its divisors is an integer number (7172698830).

Almost surely, 2^51643431522 is an apocalyptic number.

51643431522 is an abundant number, since it is smaller than the sum of its proper divisors (63119749758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51643431522 is a wasteful number, since it uses less digits than its factorization.

51643431522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956359854 (or 956359848 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The spelling of 51643431522 in words is "fifty-one billion, six hundred forty-three million, four hundred thirty-one thousand, five hundred twenty-two".