25220669 has 2 divisors, whose sum is σ = 25220670. Its totient is φ = 25220668.

The previous prime is 25220641. The next prime is 25220681. The reversal of 25220669 is 96602252.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22676644 + 2544025 = 4762^2 + 1595^2 .

It is a cyclic number.

It is not a de Polignac number, because 25220669 - 2²⁴ = 8443453 is a prime.

It is a super-2 number, since 2×25220669² = 1272164289615122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25220369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12610334 + 12610335.

It is an arithmetic number, because the mean of its divisors is an integer number (12610335).

Almost surely, 2^25220669 is an apocalyptic number.

It is an amenable number.

25220669 is a deficient number, since it is larger than the sum of its proper divisors (1).

25220669 is an equidigital number, since it uses as much as digits as its factorization.

25220669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 25220669 is about 5022.0184189228. The cubic root of 25220669 is about 293.2595749755.

The spelling of 25220669 in words is "twenty-five million, two hundred twenty thousand, six hundred sixty-nine".