25115213 has 2 divisors, whose sum is σ = 25115214. Its totient is φ = 25115212.

The previous prime is 25115197. The next prime is 25115221. The reversal of 25115213 is 31251152.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18774889 + 6340324 = 4333^2 + 2518^2 .

It is a cyclic number.

It is not a de Polignac number, because 25115213 - 2⁴ = 25115197 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25115263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12557606 + 12557607.

It is an arithmetic number, because the mean of its divisors is an integer number (12557607).

Almost surely, 2^25115213 is an apocalyptic number.

It is an amenable number.

25115213 is a deficient number, since it is larger than the sum of its proper divisors (1).

25115213 is an equidigital number, since it uses as much as digits as its factorization.

25115213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 300, while the sum is 20.

The square root of 25115213 is about 5011.5080564636. The cubic root of 25115213 is about 292.8502653720.

Adding to 25115213 its reverse (31251152), we get a palindrome (56366365).

The spelling of 25115213 in words is "twenty-five million, one hundred fifteen thousand, two hundred thirteen".