56312191 has 8 divisors (see below), whose sum is σ = 60873120. Its totient is φ = 51784032.

The previous prime is 56312173. The next prime is 56312231. The reversal of 56312191 is 19121365.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56312191 - 2⁹ = 56311679 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56312131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4555 + ... + 11548.

It is an arithmetic number, because the mean of its divisors is an integer number (7609140).

Almost surely, 2^56312191 is an apocalyptic number.

56312191 is a deficient number, since it is larger than the sum of its proper divisors (4560929).

56312191 is a wasteful number, since it uses less digits than its factorization.

56312191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16385.

The product of its digits is 1620, while the sum is 28.

The square root of 56312191 is about 7504.1449213085. The cubic root of 56312191 is about 383.2958717435.

The spelling of 56312191 in words is "fifty-six million, three hundred twelve thousand, one hundred ninety-one".