56106391 has 12 divisors (see below), whose sum is σ = 62564040. Its totient is φ = 49898960.

The previous prime is 56106389. The next prime is 56106419. The reversal of 56106391 is 19360165.

It is not a de Polignac number, because 56106391 - 2¹ = 56106389 is a prime.

It is a super-2 number, since 2×56106391² = 6295854222089762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56106331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23145 + ... + 25453.

It is an arithmetic number, because the mean of its divisors is an integer number (5213670).

Almost surely, 2^56106391 is an apocalyptic number.

56106391 is a deficient number, since it is larger than the sum of its proper divisors (6457649).

56106391 is a wasteful number, since it uses less digits than its factorization.

56106391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2414 (or 2367 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 56106391 is about 7490.4199481738. The cubic root of 56106391 is about 382.8283674034.

The spelling of 56106391 in words is "fifty-six million, one hundred six thousand, three hundred ninety-one".