55221822 has 12 divisors (see below), whose sum is σ = 119647320. Its totient is φ = 18407268.

The previous prime is 55221821. The next prime is 55221841. The reversal of 55221822 is 22812255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55221821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1533922 + ... + 1533957.

It is an arithmetic number, because the mean of its divisors is an integer number (9970610).

Almost surely, 2^55221822 is an apocalyptic number.

55221822 is an abundant number, since it is smaller than the sum of its proper divisors (64425498).

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

55221822 is a wasteful number, since it uses less digits than its factorization.

55221822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3067887 (or 3067884 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 55221822 is about 7431.1386745236. The cubic root of 55221822 is about 380.8058199964.

The spelling of 55221822 in words is "fifty-five million, two hundred twenty-one thousand, eight hundred twenty-two".