25623217 has 2 divisors, whose sum is σ = 25623218. Its totient is φ = 25623216.

The previous prime is 25623197. The next prime is 25623239. The reversal of 25623217 is 71232652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22695696 + 2927521 = 4764^2 + 1711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25623217 is a prime.

It is not a weakly prime, because it can be changed into another prime (25023217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12811608 + 12811609.

It is an arithmetic number, because the mean of its divisors is an integer number (12811609).

Almost surely, 2^25623217 is an apocalyptic number.

It is an amenable number.

25623217 is a deficient number, since it is larger than the sum of its proper divisors (1).

25623217 is an equidigital number, since it uses as much as digits as its factorization.

25623217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 28.

The square root of 25623217 is about 5061.9380675785. The cubic root of 25623217 is about 294.8115889699.

Adding to 25623217 its reverse (71232652), we get a palindrome (96855869).

The spelling of 25623217 in words is "twenty-five million, six hundred twenty-three thousand, two hundred seventeen".