172238165 has 8 divisors (see below), whose sum is σ = 225475488. Its totient is φ = 125264080.

The previous prime is 172238161. The next prime is 172238179. The reversal of 172238165 is 561832271.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172238165 - 2² = 172238161 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172238161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1565747 + ... + 1565856.

It is an arithmetic number, because the mean of its divisors is an integer number (28184436).

Almost surely, 2^172238165 is an apocalyptic number.

It is an amenable number.

172238165 is a deficient number, since it is larger than the sum of its proper divisors (53237323).

172238165 is a wasteful number, since it uses less digits than its factorization.

172238165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3131619.

The product of its digits is 20160, while the sum is 35.

The square root of 172238165 is about 13123.9538630704. The cubic root of 172238165 is about 556.3863455694.

The spelling of 172238165 in words is "one hundred seventy-two million, two hundred thirty-eight thousand, one hundred sixty-five".