55331224 has 32 divisors (see below), whose sum is σ = 112155120. Its totient is φ = 25439616.

The previous prime is 55331197. The next prime is 55331251. The reversal of 55331224 is 42213355.

It is an interprime number because it is at equal distance from previous prime (55331197) and next prime (55331251).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31062 + ... + 32794.

Almost surely, 2^55331224 is an apocalyptic number.

It is an amenable number.

55331224 is an abundant number, since it is smaller than the sum of its proper divisors (56823896).

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

55331224 is a wasteful number, since it uses less digits than its factorization.

55331224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2059 (or 2055 counting only the distinct ones).

The product of its digits is 3600, while the sum is 25.

The square root of 55331224 is about 7438.4960845590. The cubic root of 55331224 is about 381.0571302880.

Adding to 55331224 its reverse (42213355), we get a palindrome (97544579).

It can be divided in two parts, 55331 and 224, that added together give a palindrome (55555).

The spelling of 55331224 in words is "fifty-five million, three hundred thirty-one thousand, two hundred twenty-four".