55012224 has 32 divisors (see below), whose sum is σ = 146127240. Its totient is φ = 18337280.

The previous prime is 55012219. The next prime is 55012241. The reversal of 55012224 is 42221055.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 55012224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71247 + ... + 72014.

Almost surely, 2^55012224 is an apocalyptic number.

It is an amenable number.

55012224 is an abundant number, since it is smaller than the sum of its proper divisors (91115016).

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

55012224 is a wasteful number, since it uses less digits than its factorization.

55012224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143278 (or 143266 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 55012224 is about 7417.0225832203. The cubic root of 55012224 is about 380.3234181048.

Adding to 55012224 its reverse (42221055), we get a palindrome (97233279).

The spelling of 55012224 in words is "fifty-five million, twelve thousand, two hundred twenty-four".