51800976 has 60 divisors (see below), whose sum is σ = 145466880. Its totient is φ = 17208000.

The previous prime is 51800971. The next prime is 51800993. The reversal of 51800976 is 67900815.

It is a super-2 number, since 2×51800976² = 5366682229105152, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51800976.

It is not an unprimeable number, because it can be changed into a prime (51800971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68601 + ... + 69351.

It is an arithmetic number, because the mean of its divisors is an integer number (2424448).

Almost surely, 2^51800976 is an apocalyptic number.

It is an amenable number.

51800976 is an abundant number, since it is smaller than the sum of its proper divisors (93665904).

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

51800976 is a wasteful number, since it uses less digits than its factorization.

51800976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244 (or 1235 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 51800976 is about 7197.2894898010. The cubic root of 51800976 is about 372.7743150042.

The spelling of 51800976 in words is "fifty-one million, eight hundred thousand, nine hundred seventy-six".