56273391 has 12 divisors (see below), whose sum is σ = 81506568. Its totient is φ = 37412784.

The previous prime is 56273389. The next prime is 56273423. The reversal of 56273391 is 19337265.

56273391 is a `hidden beast` number, since 562 + 7 + 3 + 3 + 91 = 666.

It is not a de Polignac number, because 56273391 - 2¹ = 56273389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56275391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5025 + ... + 11738.

It is an arithmetic number, because the mean of its divisors is an integer number (6792214).

Almost surely, 2^56273391 is an apocalyptic number.

56273391 is a deficient number, since it is larger than the sum of its proper divisors (25233177).

56273391 is a wasteful number, since it uses less digits than its factorization.

56273391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17142 (or 17139 counting only the distinct ones).

The product of its digits is 34020, while the sum is 36.

The square root of 56273391 is about 7501.5592379185. The cubic root of 56273391 is about 383.2078191891.

The spelling of 56273391 in words is "fifty-six million, two hundred seventy-three thousand, three hundred ninety-one".