172222156 has 24 divisors (see below), whose sum is σ = 317706480. Its totient is φ = 81461952.

The previous prime is 172222151. The next prime is 172222243. The reversal of 172222156 is 651222271.

172222156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (172222151) 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, 75870 + ... + 78106.

It is an arithmetic number, because the mean of its divisors is an integer number (13237770).

Almost surely, 2^172222156 is an apocalyptic number.

It is an amenable number.

172222156 is a deficient number, since it is larger than the sum of its proper divisors (145484324).

172222156 is a wasteful number, since it uses less digits than its factorization.

172222156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3273 (or 3271 counting only the distinct ones).

The product of its digits is 3360, while the sum is 28.

The square root of 172222156 is about 13123.3439336169. The cubic root of 172222156 is about 556.3691069104.

The spelling of 172222156 in words is "one hundred seventy-two million, two hundred twenty-two thousand, one hundred fifty-six".