56158409 has 4 divisors (see below), whose sum is σ = 56179200. Its totient is φ = 56137620.

The previous prime is 56158379. The next prime is 56158423. The reversal of 56158409 is 90485165.

56158409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 56158409 - 2⁸ = 56158153 is a prime.

It is a super-2 number, since 2×56158409² = 6307533802822562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56158469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5609 + ... + 11990.

It is an arithmetic number, because the mean of its divisors is an integer number (14044800).

Almost surely, 2^56158409 is an apocalyptic number.

It is an amenable number.

56158409 is a deficient number, since it is larger than the sum of its proper divisors (20791).

56158409 is a wasteful number, since it uses less digits than its factorization.

56158409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20790.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 56158409 is about 7493.8914457043. The cubic root of 56158409 is about 382.9466415996.

The spelling of 56158409 in words is "fifty-six million, one hundred fifty-eight thousand, four hundred nine".