25320881 has 2 divisors, whose sum is σ = 25320882. Its totient is φ = 25320880.

The previous prime is 25320877. The next prime is 25320923. The reversal of 25320881 is 18802352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21077281 + 4243600 = 4591^2 + 2060^2 .

It is a cyclic number.

It is not a de Polignac number, because 25320881 - 2² = 25320877 is a prime.

It is a super-2 number, since 2×25320881² = 1282294029232322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25320481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12660440 + 12660441.

It is an arithmetic number, because the mean of its divisors is an integer number (12660441).

Almost surely, 2^25320881 is an apocalyptic number.

It is an amenable number.

25320881 is a deficient number, since it is larger than the sum of its proper divisors (1).

25320881 is an equidigital number, since it uses as much as digits as its factorization.

25320881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 25320881 is about 5031.9857909179. The cubic root of 25320881 is about 293.6474749496.

The spelling of 25320881 in words is "twenty-five million, three hundred twenty thousand, eight hundred eighty-one".