56306621 has 16 divisors (see below), whose sum is σ = 65652480. Its totient is φ = 47295360.

The previous prime is 56306597. The next prime is 56306623. The reversal of 56306621 is 12660365.

It is not a de Polignac number, because 56306621 - 2¹⁰ = 56305597 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 (56306623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137465 + ... + 137873.

It is an arithmetic number, because the mean of its divisors is an integer number (4103280).

Almost surely, 2^56306621 is an apocalyptic number.

It is an amenable number.

56306621 is a deficient number, since it is larger than the sum of its proper divisors (9345859).

56306621 is a wasteful number, since it uses less digits than its factorization.

56306621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 56306621 is about 7503.7737839037. The cubic root of 56306621 is about 383.2832336962.

Adding to 56306621 its reverse (12660365), we get a palindrome (68966986).

The spelling of 56306621 in words is "fifty-six million, three hundred six thousand, six hundred twenty-one".