56001091 has 4 divisors (see below), whose sum is σ = 57514672. Its totient is φ = 54487512.

The previous prime is 56001083. The next prime is 56001133. The reversal of 56001091 is 19010065.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56001091 - 2³ = 56001083 is a prime.

It is a super-2 number, since 2×56001091² = 6272244386380562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56001041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756735 + ... + 756808.

It is an arithmetic number, because the mean of its divisors is an integer number (14378668).

Almost surely, 2^56001091 is an apocalyptic number.

56001091 is a deficient number, since it is larger than the sum of its proper divisors (1513581).

56001091 is a wasteful number, since it uses less digits than its factorization.

56001091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513580.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 56001091 is about 7483.3876686966. The cubic root of 56001091 is about 382.5887210716.

The spelling of 56001091 in words is "fifty-six million, one thousand, ninety-one".