213423125 has 10 divisors (see below), whose sum is σ = 266694318. Its totient is φ = 170738000.

The previous prime is 213423109. The next prime is 213423139. The reversal of 213423125 is 521324312.

It can be written as a sum of positive squares in 5 ways, for example, as 146870161 + 66552964 = 12119^2 + 8158^2 .

It is not a de Polignac number, because 213423125 - 2⁴ = 213423109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213423125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 170114 + ... + 171363.

Almost surely, 2^213423125 is an apocalyptic number.

213423125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213423125 is a deficient number, since it is larger than the sum of its proper divisors (53271193).

213423125 is an frugal number, since it uses more digits than its factorization.

213423125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341497 (or 341482 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 213423125 is about 14609.0083510141. The cubic root of 213423125 is about 597.6044529491.

Adding to 213423125 its reverse (521324312), we get a palindrome (734747437).

The spelling of 213423125 in words is "two hundred thirteen million, four hundred twenty-three thousand, one hundred twenty-five".