55222668 has 48 divisors (see below), whose sum is σ = 143710560. Its totient is φ = 18338112.

The previous prime is 55222649. The next prime is 55222669. The reversal of 55222668 is 86622255.

It is a super-2 number, since 2×55222668² = 6099086122076448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (55222669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33430 + ... + 35042.

It is an arithmetic number, because the mean of its divisors is an integer number (2993970).

Almost surely, 2^55222668 is an apocalyptic number.

It is an amenable number.

55222668 is an abundant number, since it is smaller than the sum of its proper divisors (88487892).

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

55222668 is a wasteful number, since it uses less digits than its factorization.

55222668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943 (or 1935 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 55222668 is about 7431.1955969413. The cubic root of 55222668 is about 380.8077646388.

It can be divided in two parts, 552 and 22668, that added together give a triangular number (23220 = T₂₁₅).

The spelling of 55222668 in words is "fifty-five million, two hundred twenty-two thousand, six hundred sixty-eight".