56217205 has 12 divisors (see below), whose sum is σ = 74151756. Its totient is φ = 40884800.

The previous prime is 56217197. The next prime is 56217241. The reversal of 56217205 is 50271265.

It can be written as a sum of positive squares in 2 ways, for example, as 6345361 + 49871844 = 2519^2 + 7062^2 .

It is not a de Polignac number, because 56217205 - 2³ = 56217197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45856 + ... + 47065.

It is an arithmetic number, because the mean of its divisors is an integer number (6179313).

Almost surely, 2^56217205 is an apocalyptic number.

56217205 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56217205 is a deficient number, since it is larger than the sum of its proper divisors (17934551).

56217205 is a wasteful number, since it uses less digits than its factorization.

56217205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92948 (or 92937 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 56217205 is about 7497.8133479035. The cubic root of 56217205 is about 383.0802391496.

The spelling of 56217205 in words is "fifty-six million, two hundred seventeen thousand, two hundred five".