51164694 has 48 divisors (see below), whose sum is σ = 130790400. Its totient is φ = 14145840.

The previous prime is 51164693. The next prime is 51164699. The reversal of 51164694 is 49646115.

51164694 is a `hidden beast` number, since 5 + 1 + 1 + 646 + 9 + 4 = 666.

It is a super-2 number, since 2×51164694² = 5235651824227272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51164693) 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, 2644 + ... + 10455.

It is an arithmetic number, because the mean of its divisors is an integer number (2724800).

Almost surely, 2^51164694 is an apocalyptic number.

51164694 is an abundant number, since it is smaller than the sum of its proper divisors (79625706).

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

51164694 is a wasteful number, since it uses less digits than its factorization.

51164694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13145 (or 13142 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 51164694 is about 7152.9500207956. The cubic root of 51164694 is about 371.2417350131.

The spelling of 51164694 in words is "fifty-one million, one hundred sixty-four thousand, six hundred ninety-four".