56405443 has 4 divisors (see below), whose sum is σ = 56438208. Its totient is φ = 56372680.

The previous prime is 56405431. The next prime is 56405449. The reversal of 56405443 is 34450465.

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

It is a cyclic number.

It is not a de Polignac number, because 56405443 - 2¹³ = 56397251 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56405449) 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, 13648 + ... + 17293.

It is an arithmetic number, because the mean of its divisors is an integer number (14109552).

Almost surely, 2^56405443 is an apocalyptic number.

56405443 is a deficient number, since it is larger than the sum of its proper divisors (32765).

56405443 is a wasteful number, since it uses less digits than its factorization.

56405443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32764.

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 56405443 is about 7510.3557172746. The cubic root of 56405443 is about 383.5073321404.

The spelling of 56405443 in words is "fifty-six million, four hundred five thousand, four hundred forty-three".