55871530 has 64 divisors (see below), whose sum is σ = 119750400. Its totient is φ = 18501120.

The previous prime is 55871509. The next prime is 55871549. The reversal of 55871530 is 3517855.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127051 + ... + 127489.

It is an arithmetic number, because the mean of its divisors is an integer number (1871100).

Almost surely, 2^55871530 is an apocalyptic number.

55871530 is an abundant number, since it is smaller than the sum of its proper divisors (63878870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55871530 is a wasteful number, since it uses less digits than its factorization.

55871530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559.

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 55871530 is about 7474.7260819377. The cubic root of 55871530 is about 382.2934479380.

It can be divided in two parts, 5587 and 1530, that added together give a palindrome (7117).

The spelling of 55871530 in words is "fifty-five million, eight hundred seventy-one thousand, five hundred thirty".