222243990 has 16 divisors (see below), whose sum is σ = 533385648. Its totient is φ = 59265056.

The previous prime is 222243977. The next prime is 222243997. The reversal of 222243990 is 99342222.

It is a happy number.

It is a super-2 number, since 2×222243990² = 98784782182240200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222243997) 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, 3704037 + ... + 3704096.

It is an arithmetic number, because the mean of its divisors is an integer number (33336603).

Almost surely, 2^222243990 is an apocalyptic number.

222243990 is an abundant number, since it is smaller than the sum of its proper divisors (311141658).

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

222243990 is a wasteful number, since it uses less digits than its factorization.

222243990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7408143.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 222243990 is about 14907.8499455824. The cubic root of 222243990 is about 605.7266409703.

The spelling of 222243990 in words is "two hundred twenty-two million, two hundred forty-three thousand, nine hundred ninety".