25214309 has 2 divisors, whose sum is σ = 25214310. Its totient is φ = 25214308.

The previous prime is 25214291. The next prime is 25214317. The reversal of 25214309 is 90341252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21883684 + 3330625 = 4678^2 + 1825^2 .

It is a cyclic number.

It is not a de Polignac number, because 25214309 - 2⁸ = 25214053 is a prime.

It is a super-2 number, since 2×25214309² = 1271522756694962, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25214359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12607154 + 12607155.

It is an arithmetic number, because the mean of its divisors is an integer number (12607155).

Almost surely, 2^25214309 is an apocalyptic number.

It is an amenable number.

25214309 is a deficient number, since it is larger than the sum of its proper divisors (1).

25214309 is an equidigital number, since it uses as much as digits as its factorization.

25214309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 25214309 is about 5021.3851674613. The cubic root of 25214309 is about 293.2349220781.

The spelling of 25214309 in words is "twenty-five million, two hundred fourteen thousand, three hundred nine".