56442993 has 4 divisors (see below), whose sum is σ = 75257328. Its totient is φ = 37628660.

The previous prime is 56442979. The next prime is 56443001. The reversal of 56442993 is 39924465.

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 56442993 - 2¹² = 56438897 is a prime.

It is a super-2 number, since 2×56442993² = 6371622917596098, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56442973) 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, 9407163 + ... + 9407168.

It is an arithmetic number, because the mean of its divisors is an integer number (18814332).

Almost surely, 2^56442993 is an apocalyptic number.

It is an amenable number.

56442993 is a deficient number, since it is larger than the sum of its proper divisors (18814335).

56442993 is a wasteful number, since it uses less digits than its factorization.

56442993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18814334.

The product of its digits is 233280, while the sum is 42.

The square root of 56442993 is about 7512.8551829514. The cubic root of 56442993 is about 383.5924155717.

The spelling of 56442993 in words is "fifty-six million, four hundred forty-two thousand, nine hundred ninety-three".