51157911 has 24 divisors (see below), whose sum is σ = 82802304. Its totient is φ = 27960240.

The previous prime is 51157901. The next prime is 51157919. The reversal of 51157911 is 11975115.

It is not a de Polignac number, because 51157911 - 2⁹ = 51157399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51157919) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4185 + ... + 10946.

It is an arithmetic number, because the mean of its divisors is an integer number (3450096).

Almost surely, 2^51157911 is an apocalyptic number.

51157911 is a deficient number, since it is larger than the sum of its proper divisors (31644393).

51157911 is a wasteful number, since it uses less digits than its factorization.

51157911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15171 (or 15164 counting only the distinct ones).

The product of its digits is 1575, while the sum is 30.

The square root of 51157911 is about 7152.4758650414. The cubic root of 51157911 is about 371.2253288824.

The spelling of 51157911 in words is "fifty-one million, one hundred fifty-seven thousand, nine hundred eleven".