51031970904 has 32 divisors (see below), whose sum is σ = 127614021120. Its totient is φ = 17006111136.

The previous prime is 51031970887. The next prime is 51031970917. The reversal of 51031970904 is 40907913015.

It is a happy number.

51031970904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191824 + ... + 372639.

It is an arithmetic number, because the mean of its divisors is an integer number (3987938160).

Almost surely, 2^51031970904 is an apocalyptic number.

It is an amenable number.

51031970904 is an abundant number, since it is smaller than the sum of its proper divisors (76582050216).

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

51031970904 is a wasteful number, since it uses less digits than its factorization.

51031970904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568239 (or 568235 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 39.

The spelling of 51031970904 in words is "fifty-one billion, thirty-one million, nine hundred seventy thousand, nine hundred four".