56153391 has 16 divisors (see below), whose sum is σ = 87389184. Its totient is φ = 31404384.

The previous prime is 56153387. The next prime is 56153413. The reversal of 56153391 is 19335165.

It is not a de Polignac number, because 56153391 - 2² = 56153387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56153371) 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, 27460 + ... + 29433.

It is an arithmetic number, because the mean of its divisors is an integer number (5461824).

Almost surely, 2^56153391 is an apocalyptic number.

56153391 is a deficient number, since it is larger than the sum of its proper divisors (31235793).

56153391 is a wasteful number, since it uses less digits than its factorization.

56153391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56950.

The product of its digits is 12150, while the sum is 33.

The square root of 56153391 is about 7493.5566322008. The cubic root of 56153391 is about 382.9352352729.

The spelling of 56153391 in words is "fifty-six million, one hundred fifty-three thousand, three hundred ninety-one".