56503409 has 4 divisors (see below), whose sum is σ = 56535360. Its totient is φ = 56471460.

The previous prime is 56503399. The next prime is 56503411. The reversal of 56503409 is 90430565.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-56503409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56503429) 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, 13157 + ... + 16914.

It is an arithmetic number, because the mean of its divisors is an integer number (14133840).

Almost surely, 2^56503409 is an apocalyptic number.

It is an amenable number.

56503409 is a deficient number, since it is larger than the sum of its proper divisors (31951).

56503409 is a wasteful number, since it uses less digits than its factorization.

56503409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31950.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 56503409 is about 7516.8749490729. The cubic root of 56503409 is about 383.7292312286.

The spelling of 56503409 in words is "fifty-six million, five hundred three thousand, four hundred nine".