55124442 has 16 divisors (see below), whose sum is σ = 122498880. Its totient is φ = 18374796.

The previous prime is 55124441. The next prime is 55124449. The reversal of 55124442 is 24442155.

It is a super-2 number, since 2×55124442² = 6077408211622728, which contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (55124441) 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, 510358 + ... + 510465.

It is an arithmetic number, because the mean of its divisors is an integer number (7656180).

Almost surely, 2^55124442 is an apocalyptic number.

55124442 is an abundant number, since it is smaller than the sum of its proper divisors (67374438).

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

55124442 is a wasteful number, since it uses less digits than its factorization.

55124442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020834 (or 1020828 counting only the distinct ones).

The product of its digits is 6400, while the sum is 27.

The square root of 55124442 is about 7424.5836246890. The cubic root of 55124442 is about 380.5818464022.

Adding to 55124442 its reverse (24442155), we get a palindrome (79566597).

The spelling of 55124442 in words is "fifty-five million, one hundred twenty-four thousand, four hundred forty-two".