55531563 has 4 divisors (see below), whose sum is σ = 74042088. Its totient is φ = 37021040.

The previous prime is 55531529. The next prime is 55531577. The reversal of 55531563 is 36513555.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55531563 - 2⁹ = 55531051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55531513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9255258 + ... + 9255263.

It is an arithmetic number, because the mean of its divisors is an integer number (18510522).

Almost surely, 2^55531563 is an apocalyptic number.

55531563 is a deficient number, since it is larger than the sum of its proper divisors (18510525).

55531563 is a wasteful number, since it uses less digits than its factorization.

55531563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18510524.

The product of its digits is 33750, while the sum is 33.

The square root of 55531563 is about 7451.9502816377. The cubic root of 55531563 is about 381.5164770351.

The spelling of 55531563 in words is "fifty-five million, five hundred thirty-one thousand, five hundred sixty-three".