56501405 has 8 divisors (see below), whose sum is σ = 69634392. Its totient is φ = 43979328.

The previous prime is 56501359. The next prime is 56501443. The reversal of 56501405 is 50410565.

It can be written as a sum of positive squares in 4 ways, for example, as 4502884 + 51998521 = 2122^2 + 7211^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56501405 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152522 + ... + 152891.

It is an arithmetic number, because the mean of its divisors is an integer number (8704299).

Almost surely, 2^56501405 is an apocalyptic number.

It is an amenable number.

56501405 is a deficient number, since it is larger than the sum of its proper divisors (13132987).

56501405 is a wasteful number, since it uses less digits than its factorization.

56501405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305455.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 56501405 is about 7516.7416478152. The cubic root of 56501405 is about 383.7246946146.

The spelling of 56501405 in words is "fifty-six million, five hundred one thousand, four hundred five".