25223501 has 2 divisors, whose sum is σ = 25223502. Its totient is φ = 25223500.

The previous prime is 25223489. The next prime is 25223509. The reversal of 25223501 is 10532252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13147876 + 12075625 = 3626^2 + 3475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25223501 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25223509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12611750 + 12611751.

It is an arithmetic number, because the mean of its divisors is an integer number (12611751).

Almost surely, 2^25223501 is an apocalyptic number.

It is an amenable number.

25223501 is a deficient number, since it is larger than the sum of its proper divisors (1).

25223501 is an equidigital number, since it uses as much as digits as its factorization.

25223501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 25223501 is about 5022.3003693527. The cubic root of 25223501 is about 293.2705511585.

Adding to 25223501 its reverse (10532252), we get a palindrome (35755753).

The spelling of 25223501 in words is "twenty-five million, two hundred twenty-three thousand, five hundred one".