51021121592 has 32 divisors (see below), whose sum is σ = 112857784320. Its totient is φ = 21160833120.

The previous prime is 51021121583. The next prime is 51021121597. The reversal of 51021121592 is 29512112015.

It is a super-2 number, since 2×51021121592² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51021121597) 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, 14693288 + ... + 14696759.

It is an arithmetic number, because the mean of its divisors is an integer number (3526805760).

Almost surely, 2^51021121592 is an apocalyptic number.

It is an amenable number.

51021121592 is an abundant number, since it is smaller than the sum of its proper divisors (61836662728).

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

51021121592 is a wasteful number, since it uses less digits than its factorization.

51021121592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29390091 (or 29390087 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 29.

The spelling of 51021121592 in words is "fifty-one billion, twenty-one million, one hundred twenty-one thousand, five hundred ninety-two".