56109109 has 16 divisors (see below), whose sum is σ = 69076480. Its totient is φ = 44498160.

The previous prime is 56109107. The next prime is 56109127. The reversal of 56109109 is 90190165.

It is not a de Polignac number, because 56109109 - 2¹ = 56109107 is a prime.

It is a super-2 number, since 2×56109109² = 6296464225547762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56109107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 814 + ... + 10624.

It is an arithmetic number, because the mean of its divisors is an integer number (4317280).

Almost surely, 2^56109109 is an apocalyptic number.

It is an amenable number.

56109109 is a deficient number, since it is larger than the sum of its proper divisors (12967371).

56109109 is a wasteful number, since it uses less digits than its factorization.

56109109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9880.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 56109109 is about 7490.6013777266. The cubic root of 56109109 is about 382.8345491751.

The spelling of 56109109 in words is "fifty-six million, one hundred nine thousand, one hundred nine".