56131405 has 16 divisors (see below), whose sum is σ = 75469824. Its totient is φ = 39718080.

The previous prime is 56131391. The next prime is 56131409. The reversal of 56131405 is 50413165.

It is not a de Polignac number, because 56131405 - 2⁵ = 56131373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56131405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56131409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11757 + ... + 15826.

It is an arithmetic number, because the mean of its divisors is an integer number (4716864).

Almost surely, 2^56131405 is an apocalyptic number.

56131405 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56131405 is a deficient number, since it is larger than the sum of its proper divisors (19338419).

56131405 is a wasteful number, since it uses less digits than its factorization.

56131405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27636.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 56131405 is about 7492.0894949273. The cubic root of 56131405 is about 382.8852512738.

The spelling of 56131405 in words is "fifty-six million, one hundred thirty-one thousand, four hundred five".