51157311 has 16 divisors (see below), whose sum is σ = 69057120. Its totient is φ = 33684480.

The previous prime is 51157283. The next prime is 51157339. The reversal of 51157311 is 11375115.

It is an interprime number because it is at equal distance from previous prime (51157283) and next prime (51157339).

It is not a de Polignac number, because 51157311 - 2⁵ = 51157279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51157391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124875 + ... + 125283.

It is an arithmetic number, because the mean of its divisors is an integer number (4316070).

Almost surely, 2^51157311 is an apocalyptic number.

51157311 is a deficient number, since it is larger than the sum of its proper divisors (17899809).

51157311 is a wasteful number, since it uses less digits than its factorization.

51157311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826.

The product of its digits is 525, while the sum is 24.

The square root of 51157311 is about 7152.4339214005. The cubic root of 51157311 is about 371.2238775847.

The spelling of 51157311 in words is "fifty-one million, one hundred fifty-seven thousand, three hundred eleven".