222155420 has 24 divisors (see below), whose sum is σ = 467124000. Its totient is φ = 88748352.

The previous prime is 222155411. The next prime is 222155431. The reversal of 222155420 is 24551222.

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, 9881 + ... + 23279.

It is an arithmetic number, because the mean of its divisors is an integer number (19463500).

Almost surely, 2^222155420 is an apocalyptic number.

222155420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222155420 is an abundant number, since it is smaller than the sum of its proper divisors (244968580).

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

222155420 is a wasteful number, since it uses less digits than its factorization.

222155420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14237 (or 14235 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 222155420 is about 14904.8790669364. The cubic root of 222155420 is about 605.6461643478.

The spelling of 222155420 in words is "two hundred twenty-two million, one hundred fifty-five thousand, four hundred twenty".