51751980 has 96 divisors (see below), whose sum is σ = 184020480. Its totient is φ = 11828160.

The previous prime is 51751967. The next prime is 51751981. The reversal of 51751980 is 8915715.

51751980 is a `hidden beast` number, since 517 + 51 + 98 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (51751981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3066 + ... + 10625.

It is an arithmetic number, because the mean of its divisors is an integer number (1916880).

Almost surely, 2^51751980 is an apocalyptic number.

It is an amenable number.

51751980 is an abundant number, since it is smaller than the sum of its proper divisors (132268500).

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

51751980 is a wasteful number, since it uses less digits than its factorization.

51751980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13716 (or 13708 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 36.

The square root of 51751980 is about 7193.8849031660. The cubic root of 51751980 is about 372.6567482886.

The spelling of 51751980 in words is "fifty-one million, seven hundred fifty-one thousand, nine hundred eighty".