25305529 has 2 divisors, whose sum is σ = 25305530. Its totient is φ = 25305528.

The previous prime is 25305509. The next prime is 25305541. The reversal of 25305529 is 92550352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24522304 + 783225 = 4952^2 + 885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25305529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25305529.

It is not a weakly prime, because it can be changed into another prime (25305509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12652764 + 12652765.

It is an arithmetic number, because the mean of its divisors is an integer number (12652765).

Almost surely, 2^25305529 is an apocalyptic number.

It is an amenable number.

25305529 is a deficient number, since it is larger than the sum of its proper divisors (1).

25305529 is an equidigital number, since it uses as much as digits as its factorization.

25305529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 25305529 is about 5030.4601181204. The cubic root of 25305529 is about 293.5881169909.

The spelling of 25305529 in words is "twenty-five million, three hundred five thousand, five hundred twenty-nine".