222161556 has 24 divisors (see below), whose sum is σ = 525680064. Its totient is φ = 73010560.

The previous prime is 222161549. The next prime is 222161561. The reversal of 222161556 is 655161222.

It is a super-2 number, since 2×222161556² = 98711513928682272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129525 + ... + 131228.

It is an arithmetic number, because the mean of its divisors is an integer number (21903336).

Almost surely, 2^222161556 is an apocalyptic number.

It is an amenable number.

222161556 is an abundant number, since it is smaller than the sum of its proper divisors (303518508).

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

222161556 is a wasteful number, since it uses less digits than its factorization.

222161556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260831 (or 260829 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 222161556 is about 14905.0849041527. The cubic root of 222161556 is about 605.6517403400.

The spelling of 222161556 in words is "two hundred twenty-two million, one hundred sixty-one thousand, five hundred fifty-six".