25220869 has 2 divisors, whose sum is σ = 25220870. Its totient is φ = 25220868.

The previous prime is 25220861. The next prime is 25220929. The reversal of 25220869 is 96802252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22448644 + 2772225 = 4738^2 + 1665^2 .

It is a cyclic number.

It is not a de Polignac number, because 25220869 - 2³ = 25220861 is a prime.

It is a super-2 number, since 2×25220869² = 1272184466230322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25220861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12610434 + 12610435.

It is an arithmetic number, because the mean of its divisors is an integer number (12610435).

Almost surely, 2^25220869 is an apocalyptic number.

It is an amenable number.

25220869 is a deficient number, since it is larger than the sum of its proper divisors (1).

25220869 is an equidigital number, since it uses as much as digits as its factorization.

25220869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 25220869 is about 5022.0383311958. The cubic root of 25220869 is about 293.2603501567.

The spelling of 25220869 in words is "twenty-five million, two hundred twenty thousand, eight hundred sixty-nine".