25211213 has 2 divisors, whose sum is σ = 25211214. Its totient is φ = 25211212.

The previous prime is 25211209. The next prime is 25211227. The reversal of 25211213 is 31211252.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16467364 + 8743849 = 4058^2 + 2957^2 .

It is a cyclic number.

It is not a de Polignac number, because 25211213 - 2² = 25211209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25211191 and 25211200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25211203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12605606 + 12605607.

It is an arithmetic number, because the mean of its divisors is an integer number (12605607).

Almost surely, 2^25211213 is an apocalyptic number.

It is an amenable number.

25211213 is a deficient number, since it is larger than the sum of its proper divisors (1).

25211213 is an equidigital number, since it uses as much as digits as its factorization.

25211213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120, while the sum is 17.

The square root of 25211213 is about 5021.0768765276. The cubic root of 25211213 is about 293.2229197335. Note that the first 3 decimals are identical.

Adding to 25211213 its reverse (31211252), we get a palindrome (56422465).

The spelling of 25211213 in words is "twenty-five million, two hundred eleven thousand, two hundred thirteen".