56117509 has 8 divisors (see below), whose sum is σ = 65013440. Its totient is φ = 47441376.

The previous prime is 56117491. The next prime is 56117521. The reversal of 56117509 is 90571165.

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 56117509 - 2⁷ = 56117381 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 (56117549) 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, 54399 + ... + 55420.

It is an arithmetic number, because the mean of its divisors is an integer number (8126680).

Almost surely, 2^56117509 is an apocalyptic number.

It is an amenable number.

56117509 is a deficient number, since it is larger than the sum of its proper divisors (8895931).

56117509 is a wasteful number, since it uses less digits than its factorization.

56117509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109899.

The product of its (nonzero) digits is 9450, while the sum is 34.

The square root of 56117509 is about 7491.1620593870. The cubic root of 56117509 is about 382.8536527265.

The spelling of 56117509 in words is "fifty-six million, one hundred seventeen thousand, five hundred nine".