222293778 has 16 divisors (see below), whose sum is σ = 508100160. Its totient is φ = 63512496.

The previous prime is 222293741. The next prime is 222293791. The reversal of 222293778 is 877392222.

222293778 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 5292709 = 222293778 / (2 + 2 + 2 + 2 + 9 + 3 + 7 + 7 + 8).

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, 2646313 + ... + 2646396.

It is an arithmetic number, because the mean of its divisors is an integer number (31756260).

Almost surely, 2^222293778 is an apocalyptic number.

222293778 is an abundant number, since it is smaller than the sum of its proper divisors (285806382).

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

222293778 is a wasteful number, since it uses less digits than its factorization.

222293778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5292721.

The product of its digits is 169344, while the sum is 42.

The square root of 222293778 is about 14909.5197105742. The cubic root of 222293778 is about 605.7718700392.

The spelling of 222293778 in words is "two hundred twenty-two million, two hundred ninety-three thousand, seven hundred seventy-eight".