222388118820 has 72 divisors (see below), whose sum is σ = 770945482944. Its totient is φ = 50831569728.

The previous prime is 222388118779. The next prime is 222388118857. The reversal of 222388118820 is 28811883222.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88247994 + ... + 88250513.

It is an arithmetic number, because the mean of its divisors is an integer number (10707576152).

Almost surely, 2^222388118820 is an apocalyptic number.

222388118820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222388118820 is an abundant number, since it is smaller than the sum of its proper divisors (548557364124).

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

222388118820 is a wasteful number, since it uses less digits than its factorization.

222388118820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176498529 (or 176498524 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 45.

The spelling of 222388118820 in words is "two hundred twenty-two billion, three hundred eighty-eight million, one hundred eighteen thousand, eight hundred twenty".