51157000 has 32 divisors (see below), whose sum is σ = 119709720. Its totient is φ = 20462400.

The previous prime is 51156983. The next prime is 51157019. The reversal of 51157000 is 75115.

It can be written as a sum of positive squares in 4 ways, for example, as 32649796 + 18507204 = 5714^2 + 4302^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24579 + ... + 26578.

Almost surely, 2^51157000 is an apocalyptic number.

51157000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51157000 is an abundant number, since it is smaller than the sum of its proper divisors (68552720).

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

51157000 is a wasteful number, since it uses less digits than its factorization.

51157000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51178 (or 51164 counting only the distinct ones).

The product of its (nonzero) digits is 175, while the sum is 19.

The square root of 51157000 is about 7152.4121805164. The cubic root of 51157000 is about 371.2231253243.

The spelling of 51157000 in words is "fifty-one million, one hundred fifty-seven thousand".