51520200056 has 32 divisors (see below), whose sum is σ = 104046087600. Its totient is φ = 23775144960.

The previous prime is 51520200029. The next prime is 51520200103. The reversal of 51520200056 is 65000202515.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 51520199998 and 51520200034.

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, 783875 + ... + 847053.

Almost surely, 2^51520200056 is an apocalyptic number.

It is an amenable number.

51520200056 is an abundant number, since it is smaller than the sum of its proper divisors (52525887544).

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

51520200056 is a wasteful number, since it uses less digits than its factorization.

51520200056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71039 (or 71035 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The spelling of 51520200056 in words is "fifty-one billion, five hundred twenty million, two hundred thousand, fifty-six".