55531564 has 12 divisors (see below), whose sum is σ = 106014888. Its totient is φ = 25241600.

The previous prime is 55531529. The next prime is 55531577. The reversal of 55531564 is 46513555.

55531564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 630997 + ... + 631084.

It is an arithmetic number, because the mean of its divisors is an integer number (8834574).

Almost surely, 2^55531564 is an apocalyptic number.

It is an amenable number.

55531564 is a deficient number, since it is larger than the sum of its proper divisors (50483324).

55531564 is a wasteful number, since it uses less digits than its factorization.

55531564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262096 (or 1262094 counting only the distinct ones).

The product of its digits is 45000, while the sum is 34.

The square root of 55531564 is about 7451.9503487342. The cubic root of 55531564 is about 381.5164793252.

Subtracting from 55531564 its reverse (46513555), we obtain a square (9018009 = 3003²).

It can be divided in two parts, 5553 and 1564, that added together give a palindrome (7117).

The spelling of 55531564 in words is "fifty-five million, five hundred thirty-one thousand, five hundred sixty-four".