25331213 has 2 divisors, whose sum is σ = 25331214. Its totient is φ = 25331212.

The previous prime is 25331209. The next prime is 25331227. The reversal of 25331213 is 31213352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23687689 + 1643524 = 4867^2 + 1282^2 .

It is a cyclic number.

It is not a de Polignac number, because 25331213 - 2² = 25331209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25331203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12665606 + 12665607.

It is an arithmetic number, because the mean of its divisors is an integer number (12665607).

Almost surely, 2^25331213 is an apocalyptic number.

It is an amenable number.

25331213 is a deficient number, since it is larger than the sum of its proper divisors (1).

25331213 is an equidigital number, since it uses as much as digits as its factorization.

25331213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 20.

The square root of 25331213 is about 5033.0123186815. The cubic root of 25331213 is about 293.6874097520.

Adding to 25331213 its reverse (31213352), we get a palindrome (56544565).

The spelling of 25331213 in words is "twenty-five million, three hundred thirty-one thousand, two hundred thirteen".