25217279 has 2 divisors, whose sum is σ = 25217280. Its totient is φ = 25217278.

The previous prime is 25217233. The next prime is 25217299. The reversal of 25217279 is 97271252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25217279 - 2¹⁶ = 25151743 is a prime.

It is a super-2 number, since 2×25217279² = 1271822320327682, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25217299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12608639 + 12608640.

It is an arithmetic number, because the mean of its divisors is an integer number (12608640).

Almost surely, 2^25217279 is an apocalyptic number.

25217279 is a deficient number, since it is larger than the sum of its proper divisors (1).

25217279 is an equidigital number, since it uses as much as digits as its factorization.

25217279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17640, while the sum is 35.

The square root of 25217279 is about 5021.6808938840. The cubic root of 25217279 is about 293.2464350319.

The spelling of 25217279 in words is "twenty-five million, two hundred seventeen thousand, two hundred seventy-nine".