51574820 has 24 divisors (see below), whose sum is σ = 118153728. Its totient is φ = 18754400.

The previous prime is 51574819. The next prime is 51574837. The reversal of 51574820 is 2847515.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116996 + ... + 117435.

It is an arithmetic number, because the mean of its divisors is an integer number (4923072).

Almost surely, 2^51574820 is an apocalyptic number.

It is an amenable number.

51574820 is an abundant number, since it is smaller than the sum of its proper divisors (66578908).

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

51574820 is a wasteful number, since it uses less digits than its factorization.

51574820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234451 (or 234449 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 51574820 is about 7181.5611116247. The cubic root of 51574820 is about 372.2310296506.

The spelling of 51574820 in words is "fifty-one million, five hundred seventy-four thousand, eight hundred twenty".