25022509 has 2 divisors, whose sum is σ = 25022510. Its totient is φ = 25022508.

The previous prime is 25022507. The next prime is 25022527. The reversal of 25022509 is 90522052.

25022509 is nontrivially palindromic in base 13.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12981609 + 12040900 = 3603^2 + 3470^2 .

It is a cyclic number.

It is not a de Polignac number, because 25022509 - 2¹ = 25022507 is a prime.

It is a super-2 number, since 2×25022509² = 1252251913310162, which contains 22 as substring.

Together with 25022507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25022507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12511254 + 12511255.

It is an arithmetic number, because the mean of its divisors is an integer number (12511255).

Almost surely, 2^25022509 is an apocalyptic number.

It is an amenable number.

25022509 is a deficient number, since it is larger than the sum of its proper divisors (1).

25022509 is an equidigital number, since it uses as much as digits as its factorization.

25022509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 25022509 is about 5002.2503935729. The cubic root of 25022509 is about 292.4895031176.

The spelling of 25022509 in words is "twenty-five million, twenty-two thousand, five hundred nine".