222781272 has 64 divisors (see below), whose sum is σ = 646982400. Its totient is φ = 62605440.

The previous prime is 222781267. The next prime is 222781291. The reversal of 222781272 is 272187222.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 622 + ... + 21117.

It is an arithmetic number, because the mean of its divisors is an integer number (10109100).

Almost surely, 2^222781272 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 222781272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323491200).

222781272 is an abundant number, since it is smaller than the sum of its proper divisors (424201128).

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

222781272 is a wasteful number, since it uses less digits than its factorization.

222781272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21816 (or 21812 counting only the distinct ones).

The product of its digits is 12544, while the sum is 33.

The square root of 222781272 is about 14925.8591712504. The cubic root of 222781272 is about 606.2143693659.

The spelling of 222781272 in words is "two hundred twenty-two million, seven hundred eighty-one thousand, two hundred seventy-two".