56551623 has 4 divisors (see below), whose sum is σ = 75402168. Its totient is φ = 37701080.

The previous prime is 56551613. The next prime is 56551699. The reversal of 56551623 is 32615565.

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 56551623 - 2⁹ = 56551111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56551613) 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, 9425268 + ... + 9425273.

It is an arithmetic number, because the mean of its divisors is an integer number (18850542).

Almost surely, 2^56551623 is an apocalyptic number.

56551623 is a deficient number, since it is larger than the sum of its proper divisors (18850545).

56551623 is a wasteful number, since it uses less digits than its factorization.

56551623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18850544.

The product of its digits is 27000, while the sum is 33.

The square root of 56551623 is about 7520.0813160497. The cubic root of 56551623 is about 383.8383447711.

The spelling of 56551623 in words is "fifty-six million, five hundred fifty-one thousand, six hundred twenty-three".