56623215 has 32 divisors (see below), whose sum is σ = 99171072. Its totient is φ = 27360000.

The previous prime is 56623207. The next prime is 56623219. The reversal of 56623215 is 51232665.

It is not a de Polignac number, because 56623215 - 2³ = 56623207 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56623219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93915 + ... + 94515.

It is an arithmetic number, because the mean of its divisors is an integer number (3099096).

Almost surely, 2^56623215 is an apocalyptic number.

56623215 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

56623215 is a deficient number, since it is larger than the sum of its proper divisors (42547857).

56623215 is a wasteful number, since it uses less digits than its factorization.

56623215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191.

The product of its digits is 10800, while the sum is 30.

The square root of 56623215 is about 7524.8398654058. The cubic root of 56623215 is about 384.0002509221. Note that the first 3 decimals are identical.

The spelling of 56623215 in words is "fifty-six million, six hundred twenty-three thousand, two hundred fifteen".