51200980 has 12 divisors (see below), whose sum is σ = 107522100. Its totient is φ = 20480384.

The previous prime is 51200977. The next prime is 51200987. The reversal of 51200980 is 8900215.

It can be written as a sum of positive squares in 2 ways, for example, as 40780996 + 10419984 = 6386^2 + 3228^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51200987) 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, 1280005 + ... + 1280044.

It is an arithmetic number, because the mean of its divisors is an integer number (8960175).

Almost surely, 2^51200980 is an apocalyptic number.

It is an amenable number.

51200980 is an abundant number, since it is smaller than the sum of its proper divisors (56321120).

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

51200980 is a wasteful number, since it uses less digits than its factorization.

51200980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560058 (or 2560056 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 51200980 is about 7155.4860072535. The cubic root of 51200980 is about 371.3294758182.

The spelling of 51200980 in words is "fifty-one million, two hundred thousand, nine hundred eighty".