55521324 has 18 divisors (see below), whose sum is σ = 140345660. Its totient is φ = 18507096.

The previous prime is 55521317. The next prime is 55521343. The reversal of 55521324 is 42312555.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 771094 + ... + 771165.

Almost surely, 2^55521324 is an apocalyptic number.

It is an amenable number.

55521324 is an abundant number, since it is smaller than the sum of its proper divisors (84824336).

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

55521324 is a wasteful number, since it uses less digits than its factorization.

55521324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542269 (or 1542264 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 55521324 is about 7451.2632486042. The cubic root of 55521324 is about 381.4930273840.

Adding to 55521324 its reverse (42312555), we get a palindrome (97833879).

The spelling of 55521324 in words is "fifty-five million, five hundred twenty-one thousand, three hundred twenty-four".