51032100040 has 16 divisors (see below), whose sum is σ = 114822225180. Its totient is φ = 20412840000.

The previous prime is 51032100037. The next prime is 51032100071. The reversal of 51032100040 is 4000123015.

It can be written as a sum of positive squares in 2 ways, for example, as 50336512164 + 695587876 = 224358^2 + 26374^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51032099987 and 51032100023.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637901211 + ... + 637901290.

Almost surely, 2^51032100040 is an apocalyptic number.

It is an amenable number.

51032100040 is an abundant number, since it is smaller than the sum of its proper divisors (63790125140).

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

51032100040 is a wasteful number, since it uses less digits than its factorization.

51032100040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275802512 (or 1275802508 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

Adding to 51032100040 its reverse (4000123015), we get a palindrome (55032223055).

The spelling of 51032100040 in words is "fifty-one billion, thirty-two million, one hundred thousand, forty".