222397812 has 240 divisors, whose sum is σ = 755117440. Its totient is φ = 55427328.

The previous prime is 222397811. The next prime is 222397829. The reversal of 222397812 is 218793222.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222397811) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 559998 + ... + 560394.

Almost surely, 2^222397812 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 222397812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (377558720).

222397812 is an abundant number, since it is smaller than the sum of its proper divisors (532719628).

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

222397812 is a wasteful number, since it uses less digits than its factorization.

222397812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452 (or 441 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 222397812 is about 14913.0081472518. The cubic root of 222397812 is about 605.8663561776.

The spelling of 222397812 in words is "two hundred twenty-two million, three hundred ninety-seven thousand, eight hundred twelve".