56814321 has 4 divisors (see below), whose sum is σ = 75752432. Its totient is φ = 37876212.

The previous prime is 56814319. The next prime is 56814377. The reversal of 56814321 is 12341865.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 56814321 - 2¹ = 56814319 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56814521) 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, 9469051 + ... + 9469056.

It is an arithmetic number, because the mean of its divisors is an integer number (18938108).

Almost surely, 2^56814321 is an apocalyptic number.

It is an amenable number.

56814321 is a deficient number, since it is larger than the sum of its proper divisors (18938111).

56814321 is a wasteful number, since it uses less digits than its factorization.

56814321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18938110.

The product of its digits is 5760, while the sum is 30.

The square root of 56814321 is about 7537.5275123876. The cubic root of 56814321 is about 384.4317720889.

The spelling of 56814321 in words is "fifty-six million, eight hundred fourteen thousand, three hundred twenty-one".