56723251 has 4 divisors (see below), whose sum is σ = 61086592. Its totient is φ = 52359912.

The previous prime is 56723207. The next prime is 56723269. The reversal of 56723251 is 15232765.

56723251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 56723251 - 2⁷ = 56723123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56723291) 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 3 ways as a sum of consecutive naturals, for example, 2181651 + ... + 2181676.

It is an arithmetic number, because the mean of its divisors is an integer number (15271648).

Almost surely, 2^56723251 is an apocalyptic number.

56723251 is a deficient number, since it is larger than the sum of its proper divisors (4363341).

56723251 is a wasteful number, since it uses less digits than its factorization.

56723251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4363340.

The product of its digits is 12600, while the sum is 31.

The square root of 56723251 is about 7531.4839839171. The cubic root of 56723251 is about 384.2262550997.

The spelling of 56723251 in words is "fifty-six million, seven hundred twenty-three thousand, two hundred fifty-one".