22255222 has 8 divisors (see below), whose sum is σ = 36417672. Its totient is φ = 10116000.

The previous prime is 22255199. The next prime is 22255229.

22255222 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 1011601 = 22255222 / (2 + 2 + 2 + 5 + 5 + 2 + 2 + 2).

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 22255193 and 22255202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22255229) 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, 505779 + ... + 505822.

It is an arithmetic number, because the mean of its divisors is an integer number (4552209).

Almost surely, 2^22255222 is an apocalyptic number.

22255222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

22255222 is a deficient number, since it is larger than the sum of its proper divisors (14162450).

22255222 is a wasteful number, since it uses less digits than its factorization.

22255222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011614.

The product of its digits is 1600, while the sum is 22.

The square root of 22255222 is about 4717.5440644471. The cubic root of 22255222 is about 281.2833183902.

It can be divided in two parts, 2225 and 5222, that added together give a palindrome (7447).

The spelling of 22255222 in words is "twenty-two million, two hundred fifty-five thousand, two hundred twenty-two".