56394431 has 4 divisors (see below), whose sum is σ = 56413272. Its totient is φ = 56375592.

The previous prime is 56394419. The next prime is 56394449. The reversal of 56394431 is 13449365.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56394431 is a prime.

It is a super-2 number, since 2×56394431² = 6360663695627522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56394391 and 56394400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56394631) 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, 3821 + ... + 11286.

It is an arithmetic number, because the mean of its divisors is an integer number (14103318).

Almost surely, 2^56394431 is an apocalyptic number.

56394431 is a deficient number, since it is larger than the sum of its proper divisors (18841).

56394431 is a wasteful number, since it uses less digits than its factorization.

56394431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18840.

The product of its digits is 38880, while the sum is 35.

The square root of 56394431 is about 7509.6225604221. The cubic root of 56394431 is about 383.4823732158.

The spelling of 56394431 in words is "fifty-six million, three hundred ninety-four thousand, four hundred thirty-one".