172159138 has 8 divisors (see below), whose sum is σ = 267143580. Its totient is φ = 83111280.

The previous prime is 172159129. The next prime is 172159199. The reversal of 172159138 is 831951271.

It can be written as a sum of positive squares in 2 ways, for example, as 156925729 + 15233409 = 12527^2 + 3903^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 172159097 and 172159106.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1484073 + ... + 1484188.

Almost surely, 2^172159138 is an apocalyptic number.

172159138 is a deficient number, since it is larger than the sum of its proper divisors (94984442).

172159138 is a wasteful number, since it uses less digits than its factorization.

172159138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2968292.

The product of its digits is 15120, while the sum is 37.

The square root of 172159138 is about 13120.9427252770. The cubic root of 172159138 is about 556.3012380862.

The spelling of 172159138 in words is "one hundred seventy-two million, one hundred fifty-nine thousand, one hundred thirty-eight".