56501161 has 4 divisors (see below), whose sum is σ = 57297024. Its totient is φ = 55705300.

The previous prime is 56501143. The next prime is 56501213. The reversal of 56501161 is 16110565.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16110565 = 5 ⋅3222113.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56501161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56501101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397825 + ... + 397966.

It is an arithmetic number, because the mean of its divisors is an integer number (14324256).

Almost surely, 2^56501161 is an apocalyptic number.

It is an amenable number.

56501161 is a deficient number, since it is larger than the sum of its proper divisors (795863).

56501161 is an equidigital number, since it uses as much as digits as its factorization.

56501161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795862.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 56501161 is about 7516.7254173609. The cubic root of 56501161 is about 383.7241422451.

The spelling of 56501161 in words is "fifty-six million, five hundred one thousand, one hundred sixty-one".