172318238 has 16 divisors (see below), whose sum is σ = 262930704. Its totient is φ = 84680640.

The previous prime is 172318217. The next prime is 172318241. The reversal of 172318238 is 832813271.

172318238 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 172318198 and 172318207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71306 + ... + 73682.

It is an arithmetic number, because the mean of its divisors is an integer number (16433169).

Almost surely, 2^172318238 is an apocalyptic number.

172318238 is a deficient number, since it is larger than the sum of its proper divisors (90612466).

172318238 is a wasteful number, since it uses less digits than its factorization.

172318238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2987.

The product of its digits is 16128, while the sum is 35.

The square root of 172318238 is about 13127.0041517476. The cubic root of 172318238 is about 556.4725529859.

The spelling of 172318238 in words is "one hundred seventy-two million, three hundred eighteen thousand, two hundred thirty-eight".