172154338 has 4 divisors (see below), whose sum is σ = 258231510. Its totient is φ = 86077168.

The previous prime is 172154293. The next prime is 172154429. The reversal of 172154338 is 833451271.

172154338 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 833451271 = 29 ⋅28739699.

It can be written as a sum of positive squares in only one way, i.e., 123810129 + 48344209 = 11127^2 + 6953^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43038583 + ... + 43038586.

Almost surely, 2^172154338 is an apocalyptic number.

172154338 is a deficient number, since it is larger than the sum of its proper divisors (86077172).

172154338 is an equidigital number, since it uses as much as digits as its factorization.

172154338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86077171.

The product of its digits is 20160, while the sum is 34.

The square root of 172154338 is about 13120.7598103159. The cubic root of 172154338 is about 556.2960679264.

The spelling of 172154338 in words is "one hundred seventy-two million, one hundred fifty-four thousand, three hundred thirty-eight".