56247809 has 8 divisors (see below), whose sum is σ = 59796480. Its totient is φ = 52758000.

The previous prime is 56247803. The next prime is 56247839. The reversal of 56247809 is 90874265.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56247809 - 2⁸ = 56247553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56247803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12737 + ... + 16574.

It is an arithmetic number, because the mean of its divisors is an integer number (7474560).

Almost surely, 2^56247809 is an apocalyptic number.

It is an amenable number.

56247809 is a deficient number, since it is larger than the sum of its proper divisors (3548671).

56247809 is a wasteful number, since it uses less digits than its factorization.

56247809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29431.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 56247809 is about 7499.8539319109. The cubic root of 56247809 is about 383.1497413649.

The spelling of 56247809 in words is "fifty-six million, two hundred forty-seven thousand, eight hundred nine".