56319309 has 12 divisors (see below), whose sum is σ = 81534076. Its totient is φ = 37461312.

The previous prime is 56319299. The next prime is 56319331. The reversal of 56319309 is 90391365.

56319309 is a `hidden beast` number, since 563 + 1 + 93 + 0 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 53978409 + 2340900 = 7347^2 + 1530^2 .

It is not a de Polignac number, because 56319309 - 2⁹ = 56318797 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 (56319349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2734 + ... + 10959.

Almost surely, 2^56319309 is an apocalyptic number.

It is an amenable number.

56319309 is a deficient number, since it is larger than the sum of its proper divisors (25214767).

56319309 is a wasteful number, since it uses less digits than its factorization.

56319309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14156 (or 14153 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 36.

The square root of 56319309 is about 7504.6191775466. The cubic root of 56319309 is about 383.3120209113.

The spelling of 56319309 in words is "fifty-six million, three hundred nineteen thousand, three hundred nine".