51100980 has 144 divisors (see below), whose sum is σ = 174120576. Its totient is φ = 10967040.

The previous prime is 51100979. The next prime is 51100999. The reversal of 51100980 is 8900115.

It is a super-2 number, since 2×51100980² = 5222620313920800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51100980.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 121170 + ... + 121590.

Almost surely, 2^51100980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51100980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87060288).

51100980 is an abundant number, since it is smaller than the sum of its proper divisors (123019596).

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

51100980 is a wasteful number, since it uses less digits than its factorization.

51100980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 455 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 24.

The square root of 51100980 is about 7148.4949464905. The cubic root of 51100980 is about 371.0875719296.

The spelling of 51100980 in words is "fifty-one million, one hundred thousand, nine hundred eighty".