55531575 has 84 divisors (see below), whose sum is σ = 113033688. Its totient is φ = 26827200.

The previous prime is 55531529. The next prime is 55531577. The reversal of 55531575 is 57513555.

55531575 is a `hidden beast` number, since 5 + 55 + 31 + 575 = 666.

It is not a de Polignac number, because 55531575 - 2²⁰ = 54482999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55531577) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 200337 + ... + 200613.

Almost surely, 2^55531575 is an apocalyptic number.

55531575 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55531575 is an abundant number, since it is smaller than the sum of its proper divisors (57502113).

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

55531575 is a wasteful number, since it uses less digits than its factorization.

55531575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316 (or 296 counting only the distinct ones).

The product of its digits is 65625, while the sum is 36.

The square root of 55531575 is about 7451.9510867960. The cubic root of 55531575 is about 381.5165045161.

The spelling of 55531575 in words is "fifty-five million, five hundred thirty-one thousand, five hundred seventy-five".