55871523 has 6 divisors (see below), whose sum is σ = 80703324. Its totient is φ = 37247676.

The previous prime is 55871509. The next prime is 55871549. The reversal of 55871523 is 32517855.

55871523 is a `hidden beast` number, since 55 + 87 + 1 + 523 = 666.

It is not a de Polignac number, because 55871523 - 2⁴ = 55871507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55891523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3103965 + ... + 3103982.

It is an arithmetic number, because the mean of its divisors is an integer number (13450554).

Almost surely, 2^55871523 is an apocalyptic number.

55871523 is a deficient number, since it is larger than the sum of its proper divisors (24831801).

55871523 is a wasteful number, since it uses less digits than its factorization.

55871523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6207953 (or 6207950 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 55871523 is about 7474.7256136931. The cubic root of 55871523 is about 382.2934319725.

The spelling of 55871523 in words is "fifty-five million, eight hundred seventy-one thousand, five hundred twenty-three".