222155120 has 40 divisors (see below), whose sum is σ = 563468400. Its totient is φ = 80783360.

The previous prime is 222155093. The next prime is 222155161. The reversal of 222155120 is 21551222.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 222155092 and 222155101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125345 + ... + 127104.

It is an arithmetic number, because the mean of its divisors is an integer number (14086710).

Almost surely, 2^222155120 is an apocalyptic number.

222155120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222155120 is an abundant number, since it is smaller than the sum of its proper divisors (341313280).

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

222155120 is a wasteful number, since it uses less digits than its factorization.

222155120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252473 (or 252467 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 222155120 is about 14904.8690031144. The cubic root of 222155120 is about 605.6458917250.

It can be divided in two parts, 2 and 22155120, that added together give a palindrome (22155122).

The spelling of 222155120 in words is "two hundred twenty-two million, one hundred fifty-five thousand, one hundred twenty".