56302309 has 4 divisors (see below), whose sum is σ = 64345504. Its totient is φ = 48259116.

The previous prime is 56302291. The next prime is 56302373. The reversal of 56302309 is 90320365.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90320365 = 5 ⋅18064073.

It is a cyclic number.

It is not a de Polignac number, because 56302309 - 2⁵ = 56302277 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 (56302109) 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, 4021587 + ... + 4021600.

It is an arithmetic number, because the mean of its divisors is an integer number (16086376).

Almost surely, 2^56302309 is an apocalyptic number.

It is an amenable number.

56302309 is a deficient number, since it is larger than the sum of its proper divisors (8043195).

56302309 is an equidigital number, since it uses as much as digits as its factorization.

56302309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8043194.

The product of its (nonzero) digits is 4860, while the sum is 28.

The square root of 56302309 is about 7503.4864563082. The cubic root of 56302309 is about 383.2734494147.

The spelling of 56302309 in words is "fifty-six million, three hundred two thousand, three hundred nine".