222072128 has 14 divisors (see below), whose sum is σ = 440674506. Its totient is φ = 111036032.

The previous prime is 222072121. The next prime is 222072157. The reversal of 222072128 is 821270222.

It can be written as a sum of positive squares in only one way, i.e., 218803264 + 3268864 = 14792^2 + 1808^2 .

It is a junction number, because it is equal to n+sod(n) for n = 222072097 and 222072106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222072121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1734875 + ... + 1735002.

Almost surely, 2^222072128 is an apocalyptic number.

It is an amenable number.

222072128 is a deficient number, since it is larger than the sum of its proper divisors (218602378).

222072128 is an equidigital number, since it uses as much as digits as its factorization.

222072128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3469889 (or 3469879 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 222072128 is about 14902.0846863786. The cubic root of 222072128 is about 605.5704639124.

The spelling of 222072128 in words is "two hundred twenty-two million, seventy-two thousand, one hundred twenty-eight".