56437321 has 4 divisors (see below), whose sum is σ = 57962692. Its totient is φ = 54911952.

The previous prime is 56437319. The next prime is 56437333. The reversal of 56437321 is 12373465.

56437321 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 can be written as a sum of positive squares in 2 ways, for example, as 31236921 + 25200400 = 5589^2 + 5020^2 .

It is a cyclic number.

It is not a de Polignac number, because 56437321 - 2¹ = 56437319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56437301) 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, 762630 + ... + 762703.

It is an arithmetic number, because the mean of its divisors is an integer number (14490673).

Almost surely, 2^56437321 is an apocalyptic number.

It is an amenable number.

56437321 is a deficient number, since it is larger than the sum of its proper divisors (1525371).

56437321 is a wasteful number, since it uses less digits than its factorization.

56437321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525370.

The product of its digits is 15120, while the sum is 31.

The square root of 56437321 is about 7512.4776871549. The cubic root of 56437321 is about 383.5795659752.

The spelling of 56437321 in words is "fifty-six million, four hundred thirty-seven thousand, three hundred twenty-one".