172253161 has 2 divisors, whose sum is σ = 172253162. Its totient is φ = 172253160.

The previous prime is 172253153. The next prime is 172253239. The reversal of 172253161 is 161352271.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94478400 + 77774761 = 9720^2 + 8819^2 .

It is a cyclic number.

It is not a de Polignac number, because 172253161 - 2³ = 172253153 is a prime.

It is not a weakly prime, because it can be changed into another prime (172233161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86126580 + 86126581.

It is an arithmetic number, because the mean of its divisors is an integer number (86126581).

Almost surely, 2^172253161 is an apocalyptic number.

It is an amenable number.

172253161 is a deficient number, since it is larger than the sum of its proper divisors (1).

172253161 is an equidigital number, since it uses as much as digits as its factorization.

172253161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 28.

The square root of 172253161 is about 13124.5251723634. The cubic root of 172253161 is about 556.4024924505.

The spelling of 172253161 in words is "one hundred seventy-two million, two hundred fifty-three thousand, one hundred sixty-one".