172346213 has 4 divisors (see below), whose sum is σ = 185603628. Its totient is φ = 159088800.

The previous prime is 172346189. The next prime is 172346231. The reversal of 172346213 is 312643271.

It is a happy number.

172346213 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.

It can be written as a sum of positive squares in 2 ways, for example, as 7300804 + 165045409 = 2702^2 + 12847^2 .

It is not a de Polignac number, because 172346213 - 2⁶ = 172346149 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 (172346413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6628688 + ... + 6628713.

It is an arithmetic number, because the mean of its divisors is an integer number (46400907).

Almost surely, 2^172346213 is an apocalyptic number.

172346213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

172346213 is a deficient number, since it is larger than the sum of its proper divisors (13257415).

172346213 is a wasteful number, since it uses less digits than its factorization.

172346213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13257414.

The product of its digits is 6048, while the sum is 29.

The square root of 172346213 is about 13128.0696600833. The cubic root of 172346213 is about 556.5026648640.

Adding to 172346213 its reverse (312643271), we get a palindrome (484989484).

The spelling of 172346213 in words is "one hundred seventy-two million, three hundred forty-six thousand, two hundred thirteen".