56691351 has 12 divisors (see below), whose sum is σ = 82060680. Its totient is φ = 37714320.

The previous prime is 56691347. The next prime is 56691361. The reversal of 56691351 is 15319665.

56691351 is a `hidden beast` number, since 566 + 91 + 3 + 5 + 1 = 666.

It is not a de Polignac number, because 56691351 - 2² = 56691347 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56691301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1996 + ... + 10833.

It is an arithmetic number, because the mean of its divisors is an integer number (6838390).

Almost surely, 2^56691351 is an apocalyptic number.

56691351 is a deficient number, since it is larger than the sum of its proper divisors (25369329).

56691351 is a wasteful number, since it uses less digits than its factorization.

56691351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13326 (or 13323 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 56691351 is about 7529.3659095571. The cubic root of 56691351 is about 384.1542145890.

The spelling of 56691351 in words is "fifty-six million, six hundred ninety-one thousand, three hundred fifty-one".