213322453 has 4 divisors (see below), whose sum is σ = 213351820. Its totient is φ = 213293088.

The previous prime is 213322397. The next prime is 213322457. The reversal of 213322453 is 354223312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 119968209 + 93354244 = 10953^2 + 9662^2 .

It is a cyclic number.

It is not a de Polignac number, because 213322453 - 2²⁵ = 179768021 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 (213322457) 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, 5083 + ... + 21271.

It is an arithmetic number, because the mean of its divisors is an integer number (53337955).

Almost surely, 2^213322453 is an apocalyptic number.

It is an amenable number.

213322453 is a deficient number, since it is larger than the sum of its proper divisors (29367).

213322453 is a wasteful number, since it uses less digits than its factorization.

213322453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29366.

The product of its digits is 4320, while the sum is 25.

The square root of 213322453 is about 14605.5623993053. The cubic root of 213322453 is about 597.5104745396.

Adding to 213322453 its reverse (354223312), we get a palindrome (567545765).

The spelling of 213322453 in words is "two hundred thirteen million, three hundred twenty-two thousand, four hundred fifty-three".