55424012 has 24 divisors (see below), whose sum is σ = 117369504. Its totient is φ = 22355712.

The previous prime is 55424011. The next prime is 55424021. The reversal of 55424012 is 21042455.

It is a happy number.

It is a super-2 number, since 2×55424012² = 6143642212352288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55424011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57743 + ... + 58694.

It is an arithmetic number, because the mean of its divisors is an integer number (4890396).

Almost surely, 2^55424012 is an apocalyptic number.

It is an amenable number.

55424012 is an abundant number, since it is smaller than the sum of its proper divisors (61945492).

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

55424012 is a wasteful number, since it uses less digits than its factorization.

55424012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116465 (or 116463 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 55424012 is about 7444.7304853836. The cubic root of 55424012 is about 381.2700166146.

Adding to 55424012 its reverse (21042455), we get a palindrome (76466467).

The spelling of 55424012 in words is "fifty-five million, four hundred twenty-four thousand, twelve".