56481009 has 16 divisors (see below), whose sum is σ = 83899200. Its totient is φ = 33558336.

The previous prime is 56480993. The next prime is 56481013. The reversal of 56481009 is 90018465.

It is not a de Polignac number, because 56481009 - 2⁴ = 56480993 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56481409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23839 + ... + 26100.

It is an arithmetic number, because the mean of its divisors is an integer number (5243700).

Almost surely, 2^56481009 is an apocalyptic number.

It is an amenable number.

56481009 is a deficient number, since it is larger than the sum of its proper divisors (27418191).

56481009 is a wasteful number, since it uses less digits than its factorization.

56481009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49984.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 56481009 is about 7515.3848204866. The cubic root of 56481009 is about 383.6785164662.

The spelling of 56481009 in words is "fifty-six million, four hundred eighty-one thousand, nine".