172145326 has 4 divisors (see below), whose sum is σ = 258217992. Its totient is φ = 86072662.

The previous prime is 172145273. The next prime is 172145333. The reversal of 172145326 is 623541271.

172145326 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: 623541271 = 4423 ⋅140977.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43036330 + ... + 43036333.

It is an arithmetic number, because the mean of its divisors is an integer number (64554498).

Almost surely, 2^172145326 is an apocalyptic number.

172145326 is a deficient number, since it is larger than the sum of its proper divisors (86072666).

172145326 is an equidigital number, since it uses as much as digits as its factorization.

172145326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86072665.

The product of its digits is 10080, while the sum is 31.

The square root of 172145326 is about 13120.4163805879. The cubic root of 172145326 is about 556.2863606918.

Adding to 172145326 its reverse (623541271), we get a palindrome (795686597).

The spelling of 172145326 in words is "one hundred seventy-two million, one hundred forty-five thousand, three hundred twenty-six".