25858213 has 2 divisors, whose sum is σ = 25858214. Its totient is φ = 25858212.

The previous prime is 25858199. The next prime is 25858219. The reversal of 25858213 is 31285852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16136289 + 9721924 = 4017^2 + 3118^2 .

It is a cyclic number.

It is not a de Polignac number, because 25858213 - 2⁹ = 25857701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25858219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12929106 + 12929107.

It is an arithmetic number, because the mean of its divisors is an integer number (12929107).

Almost surely, 2^25858213 is an apocalyptic number.

It is an amenable number.

25858213 is a deficient number, since it is larger than the sum of its proper divisors (1).

25858213 is an equidigital number, since it uses as much as digits as its factorization.

25858213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19200, while the sum is 34.

The square root of 25858213 is about 5085.0971475479. The cubic root of 25858213 is about 295.7101077392.

The spelling of 25858213 in words is "twenty-five million, eight hundred fifty-eight thousand, two hundred thirteen".