55040022 has 24 divisors (see below), whose sum is σ = 120197376. Its totient is φ = 18201456.

The previous prime is 55039991. The next prime is 55040059. The reversal of 55040022 is 22004055.

55040022 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 55039977 and 55040004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9753 + ... + 14324.

It is an arithmetic number, because the mean of its divisors is an integer number (5008224).

Almost surely, 2^55040022 is an apocalyptic number.

55040022 is an abundant number, since it is smaller than the sum of its proper divisors (65157354).

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

55040022 is a wasteful number, since it uses less digits than its factorization.

55040022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24212 (or 24209 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 55040022 is about 7418.8962790970. The cubic root of 55040022 is about 380.3874672038.

Adding to 55040022 its reverse (22004055), we get a palindrome (77044077).

The spelling of 55040022 in words is "fifty-five million, forty thousand, twenty-two".