56567621 has 12 divisors (see below), whose sum is σ = 62762700. Its totient is φ = 50941440.

The previous prime is 56567611. The next prime is 56567633. The reversal of 56567621 is 12676565.

It can be written as a sum of positive squares in 2 ways, for example, as 47416996 + 9150625 = 6886^2 + 3025^2 .

It is not a de Polignac number, because 56567621 - 2¹⁰ = 56566597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56567611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11045 + ... + 15333.

It is an arithmetic number, because the mean of its divisors is an integer number (5230225).

Almost surely, 2^56567621 is an apocalyptic number.

It is an amenable number.

56567621 is a deficient number, since it is larger than the sum of its proper divisors (6195079).

56567621 is a wasteful number, since it uses less digits than its factorization.

56567621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4420 (or 4409 counting only the distinct ones).

The product of its digits is 75600, while the sum is 38.

The square root of 56567621 is about 7521.1449261399. The cubic root of 56567621 is about 383.8745362869.

It can be divided in two parts, 565 and 67621, that added together give a palindrome (68186).

The spelling of 56567621 in words is "fifty-six million, five hundred sixty-seven thousand, six hundred twenty-one".