222172724 has 6 divisors (see below), whose sum is σ = 388802274. Its totient is φ = 111086360.

The previous prime is 222172697. The next prime is 222172729. The reversal of 222172724 is 427271222.

222172724 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 215150224 + 7022500 = 14668^2 + 2650^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222172729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27771587 + ... + 27771594.

It is an arithmetic number, because the mean of its divisors is an integer number (64800379).

Almost surely, 2^222172724 is an apocalyptic number.

It is an amenable number.

222172724 is a deficient number, since it is larger than the sum of its proper divisors (166629550).

222172724 is a wasteful number, since it uses less digits than its factorization.

222172724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55543185 (or 55543183 counting only the distinct ones).

The product of its digits is 6272, while the sum is 29.

The square root of 222172724 is about 14905.4595366933. The cubic root of 222172724 is about 605.6618888185.

The spelling of 222172724 in words is "two hundred twenty-two million, one hundred seventy-two thousand, seven hundred twenty-four".