55042904 has 16 divisors (see below), whose sum is σ = 117949200. Its totient is φ = 23589792.

The previous prime is 55042877. The next prime is 55042907. The reversal of 55042904 is 40924055.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55042907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 491399 + ... + 491510.

It is an arithmetic number, because the mean of its divisors is an integer number (7371825).

Almost surely, 2^55042904 is an apocalyptic number.

It is an amenable number.

55042904 is an abundant number, since it is smaller than the sum of its proper divisors (62906296).

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

55042904 is a wasteful number, since it uses less digits than its factorization.

55042904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982922 (or 982918 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 55042904 is about 7419.0905102984. The cubic root of 55042904 is about 380.3941063578.

Adding to 55042904 its reverse (40924055), we get a palindrome (95966959).

The spelling of 55042904 in words is "fifty-five million, forty-two thousand, nine hundred four".