55624242 has 32 divisors (see below), whose sum is σ = 114022080. Its totient is φ = 18083520.

The previous prime is 55624211. The next prime is 55624243. The reversal of 55624242 is 24242655.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (55624243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66684 + ... + 67512.

It is an arithmetic number, because the mean of its divisors is an integer number (3563190).

Almost surely, 2^55624242 is an apocalyptic number.

55624242 is an abundant number, since it is smaller than the sum of its proper divisors (58397838).

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

55624242 is a wasteful number, since it uses less digits than its factorization.

55624242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098.

The product of its digits is 19200, while the sum is 30.

The square root of 55624242 is about 7458.1661284796. The cubic root of 55624242 is about 381.7286021246.

Adding to 55624242 its reverse (24242655), we get a palindrome (79866897).

The spelling of 55624242 in words is "fifty-five million, six hundred twenty-four thousand, two hundred forty-two".