56491813 has 8 divisors (see below), whose sum is σ = 65034432. Its totient is φ = 48067296.

The previous prime is 56491811. The next prime is 56491819. The reversal of 56491813 is 31819465.

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 56491813 - 2¹ = 56491811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56491811) 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, 28495 + ... + 30412.

It is an arithmetic number, because the mean of its divisors is an integer number (8129304).

Almost surely, 2^56491813 is an apocalyptic number.

It is an amenable number.

56491813 is a deficient number, since it is larger than the sum of its proper divisors (8542619).

56491813 is a wasteful number, since it uses less digits than its factorization.

56491813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59051.

The product of its digits is 25920, while the sum is 37.

The square root of 56491813 is about 7516.1035783177. The cubic root of 56491813 is about 383.7029789565.

The spelling of 56491813 in words is "fifty-six million, four hundred ninety-one thousand, eight hundred thirteen".