51870536 has 16 divisors (see below), whose sum is σ = 102978540. Its totient is φ = 24409600.

The previous prime is 51870527. The next prime is 51870547. The reversal of 51870536 is 63507815.

It can be written as a sum of positive squares in 2 ways, for example, as 46158436 + 5712100 = 6794^2 + 2390^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51870496 and 51870505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190565 + ... + 190836.

Almost surely, 2^51870536 is an apocalyptic number.

It is an amenable number.

51870536 is a deficient number, since it is larger than the sum of its proper divisors (51108004).

51870536 is a wasteful number, since it uses less digits than its factorization.

51870536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381424 (or 381420 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 51870536 is about 7202.1202433728. The cubic root of 51870536 is about 372.9410981126.

The spelling of 51870536 in words is "fifty-one million, eight hundred seventy thousand, five hundred thirty-six".