25288217 has 2 divisors, whose sum is σ = 25288218. Its totient is φ = 25288216.

The previous prime is 25288213. The next prime is 25288223. The reversal of 25288217 is 71288252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24245776 + 1042441 = 4924^2 + 1021^2 .

It is a cyclic number.

It is not a de Polignac number, because 25288217 - 2² = 25288213 is a prime.

It is not a weakly prime, because it can be changed into another prime (25288213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12644108 + 12644109.

It is an arithmetic number, because the mean of its divisors is an integer number (12644109).

Almost surely, 2^25288217 is an apocalyptic number.

It is an amenable number.

25288217 is a deficient number, since it is larger than the sum of its proper divisors (1).

25288217 is an equidigital number, since it uses as much as digits as its factorization.

25288217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17920, while the sum is 35.

The square root of 25288217 is about 5028.7391063765. The cubic root of 25288217 is about 293.5211519552.

Adding to 25288217 its sum of digits (35), we get a palindrome (25288252).

The spelling of 25288217 in words is "twenty-five million, two hundred eighty-eight thousand, two hundred seventeen".