56715621 has 16 divisors (see below), whose sum is σ = 80294400. Its totient is φ = 35486208.

The previous prime is 56715599. The next prime is 56715649. The reversal of 56715621 is 12651765.

56715621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56715621 - 2⁶ = 56715557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56715661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19500 + ... + 22218.

It is an arithmetic number, because the mean of its divisors is an integer number (5018400).

Almost surely, 2^56715621 is an apocalyptic number.

56715621 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

56715621 is a deficient number, since it is larger than the sum of its proper divisors (23578779).

56715621 is a wasteful number, since it uses less digits than its factorization.

56715621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3148.

The product of its digits is 12600, while the sum is 33.

The square root of 56715621 is about 7530.9774266027. The cubic root of 56715621 is about 384.2090265516.

The spelling of 56715621 in words is "fifty-six million, seven hundred fifteen thousand, six hundred twenty-one".