51500980 has 12 divisors (see below), whose sum is σ = 108152100. Its totient is φ = 20600384.

The previous prime is 51500959. The next prime is 51500983. The reversal of 51500980 is 8900515.

It can be written as a sum of positive squares in 2 ways, for example, as 21492496 + 30008484 = 4636^2 + 5478^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51500983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1287505 + ... + 1287544.

It is an arithmetic number, because the mean of its divisors is an integer number (9012675).

Almost surely, 2^51500980 is an apocalyptic number.

It is an amenable number.

51500980 is an abundant number, since it is smaller than the sum of its proper divisors (56651120).

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

51500980 is a wasteful number, since it uses less digits than its factorization.

51500980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2575058 (or 2575056 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 51500980 is about 7176.4183267142. The cubic root of 51500980 is about 372.0533029567.

The spelling of 51500980 in words is "fifty-one million, five hundred thousand, nine hundred eighty".