222690312 has 144 divisors (see below), whose sum is σ = 671792940. Its totient is φ = 66223872.

The previous prime is 222690289. The next prime is 222690319. The reversal of 222690312 is 213096222.

It can be written as a sum of positive squares in 2 ways, for example, as 221235876 + 1454436 = 14874^2 + 1206^2 .

It is not an unprimeable number, because it can be changed into a prime (222690319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3323703 + ... + 3323769.

Almost surely, 2^222690312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222690312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335896470).

222690312 is an abundant number, since it is smaller than the sum of its proper divisors (449102628).

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

222690312 is a wasteful number, since it uses less digits than its factorization.

222690312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 222690312 is about 14922.8117993896. The cubic root of 222690312 is about 606.1318538043.

The spelling of 222690312 in words is "two hundred twenty-two million, six hundred ninety thousand, three hundred twelve".