222521412 has 48 divisors (see below), whose sum is σ = 550714752. Its totient is φ = 69780480.

The previous prime is 222521357. The next prime is 222521413. The reversal of 222521412 is 214125222.

It is not an unprimeable number, because it can be changed into a prime (222521413) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 10228 + ... + 23444.

It is an arithmetic number, because the mean of its divisors is an integer number (11473224).

Almost surely, 2^222521412 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 222521412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275357376).

222521412 is an abundant number, since it is smaller than the sum of its proper divisors (328193340).

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

222521412 is a wasteful number, since it uses less digits than its factorization.

222521412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13308 (or 13306 counting only the distinct ones).

The product of its digits is 640, while the sum is 21.

The square root of 222521412 is about 14917.1516047803. The cubic root of 222521412 is about 605.9785743277.

Adding to 222521412 its reverse (214125222), we get a palindrome (436646634).

The spelling of 222521412 in words is "two hundred twenty-two million, five hundred twenty-one thousand, four hundred twelve".