25261213 has 2 divisors, whose sum is σ = 25261214. Its totient is φ = 25261212.

The previous prime is 25261157. The next prime is 25261267. The reversal of 25261213 is 31216252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25130169 + 131044 = 5013^2 + 362^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25261213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25261273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12630606 + 12630607.

It is an arithmetic number, because the mean of its divisors is an integer number (12630607).

Almost surely, 2^25261213 is an apocalyptic number.

It is an amenable number.

25261213 is a deficient number, since it is larger than the sum of its proper divisors (1).

25261213 is an equidigital number, since it uses as much as digits as its factorization.

25261213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 22.

The square root of 25261213 is about 5026.0534219206. The cubic root of 25261213 is about 293.4166359771.

Adding to 25261213 its reverse (31216252), we get a palindrome (56477465).

The spelling of 25261213 in words is "twenty-five million, two hundred sixty-one thousand, two hundred thirteen".