25318133 has 2 divisors, whose sum is σ = 25318134. Its totient is φ = 25318132.

The previous prime is 25318129. The next prime is 25318171. The reversal of 25318133 is 33181352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18464209 + 6853924 = 4297^2 + 2618^2 .

It is a cyclic number.

It is not a de Polignac number, because 25318133 - 2² = 25318129 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25318123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12659066 + 12659067.

It is an arithmetic number, because the mean of its divisors is an integer number (12659067).

Almost surely, 2^25318133 is an apocalyptic number.

It is an amenable number.

25318133 is a deficient number, since it is larger than the sum of its proper divisors (1).

25318133 is an equidigital number, since it uses as much as digits as its factorization.

25318133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 26.

The square root of 25318133 is about 5031.7127302739. The cubic root of 25318133 is about 293.6368516692.

Adding to 25318133 its reverse (33181352), we get a palindrome (58499485).

It can be divided in two parts, 2 and 5318133, that added together give a palindrome (5318135).

The spelling of 25318133 in words is "twenty-five million, three hundred eighteen thousand, one hundred thirty-three".