222445690 has 16 divisors (see below), whose sum is σ = 401322240. Its totient is φ = 88773840.

The previous prime is 222445679. The next prime is 222445703. The reversal of 222445690 is 96544222.

It is a super-2 number, since 2×222445690² = 98964169999152200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20946 + ... + 29725.

It is an arithmetic number, because the mean of its divisors is an integer number (25082640).

Almost surely, 2^222445690 is an apocalyptic number.

222445690 is a deficient number, since it is larger than the sum of its proper divisors (178876550).

222445690 is a wasteful number, since it uses less digits than its factorization.

222445690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51117.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 222445690 is about 14914.6133037367. The cubic root of 222445690 is about 605.9098302085.

The spelling of 222445690 in words is "two hundred twenty-two million, four hundred forty-five thousand, six hundred ninety".