222206538 has 8 divisors (see below), whose sum is σ = 444413088. Its totient is φ = 74068844.

The previous prime is 222206527. The next prime is 222206561. The reversal of 222206538 is 835602222.

It is a sphenic number, since it is the product of 3 distinct primes.

222206538 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18517206 + ... + 18517217.

It is an arithmetic number, because the mean of its divisors is an integer number (55551636).

Almost surely, 2^222206538 is an apocalyptic number.

222206538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

222206538 is a wasteful number, since it uses less digits than its factorization.

222206538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37034428.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 222206538 is about 14906.5937759100. The cubic root of 222206538 is about 605.6926138805.

The spelling of 222206538 in words is "two hundred twenty-two million, two hundred six thousand, five hundred thirty-eight".