222254778 has 16 divisors (see below), whose sum is σ = 450599616. Its totient is φ = 73069920.

The previous prime is 222254771. The next prime is 222254803. The reversal of 222254778 is 877452222.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (222254771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253278 + ... + 254153.

It is an arithmetic number, because the mean of its divisors is an integer number (28162476).

Almost surely, 2^222254778 is an apocalyptic number.

222254778 is an abundant number, since it is smaller than the sum of its proper divisors (228344838).

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

222254778 is a wasteful number, since it uses less digits than its factorization.

222254778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507509.

The product of its digits is 125440, while the sum is 39.

The square root of 222254778 is about 14908.2117639910. The cubic root of 222254778 is about 605.7364417202.

The spelling of 222254778 in words is "two hundred twenty-two million, two hundred fifty-four thousand, seven hundred seventy-eight".