56620213 has 4 divisors (see below), whose sum is σ = 60975628. Its totient is φ = 52264800.

The previous prime is 56620211. The next prime is 56620219. The reversal of 56620213 is 31202665.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2553604 + 54066609 = 1598^2 + 7353^2 .

It is a cyclic number.

It is not a de Polignac number, because 56620213 - 2¹ = 56620211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56620211) 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, 2177688 + ... + 2177713.

It is an arithmetic number, because the mean of its divisors is an integer number (15243907).

Almost surely, 2^56620213 is an apocalyptic number.

It is an amenable number.

56620213 is a deficient number, since it is larger than the sum of its proper divisors (4355415).

56620213 is a wasteful number, since it uses less digits than its factorization.

56620213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4355414.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 56620213 is about 7524.6403900785. The cubic root of 56620213 is about 383.9934646059.

Adding to 56620213 its reverse (31202665), we get a palindrome (87822878).

The spelling of 56620213 in words is "fifty-six million, six hundred twenty thousand, two hundred thirteen".