221222292 has 24 divisors (see below), whose sum is σ = 546549696. Its totient is φ = 69403008.

The previous prime is 221222291. The next prime is 221222299. The reversal of 221222292 is 292222122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221222291) 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, 542008 + ... + 542415.

It is an arithmetic number, because the mean of its divisors is an integer number (22772904).

Almost surely, 2^221222292 is an apocalyptic number.

It is an amenable number.

221222292 is an abundant number, since it is smaller than the sum of its proper divisors (325327404).

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

221222292 is a wasteful number, since it uses less digits than its factorization.

221222292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084447 (or 1084445 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

The square root of 221222292 is about 14873.5433572501. The cubic root of 221222292 is about 604.7970013114.

The spelling of 221222292 in words is "two hundred twenty-one million, two hundred twenty-two thousand, two hundred ninety-two".