25580081 has 2 divisors, whose sum is σ = 25580082. Its totient is φ = 25580080.

The previous prime is 25580077. The next prime is 25580083. The reversal of 25580081 is 18008552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25090081 + 490000 = 5009^2 + 700^2 .

It is a cyclic number.

It is not a de Polignac number, because 25580081 - 2² = 25580077 is a prime.

It is a super-2 number, since 2×25580081² = 1308681087933122, which contains 22 as substring.

Together with 25580083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25580083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12790040 + 12790041.

It is an arithmetic number, because the mean of its divisors is an integer number (12790041).

Almost surely, 2^25580081 is an apocalyptic number.

It is an amenable number.

25580081 is a deficient number, since it is larger than the sum of its proper divisors (1).

25580081 is an equidigital number, since it uses as much as digits as its factorization.

25580081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 25580081 is about 5057.6754541983. The cubic root of 25580081 is about 294.6460602410.

The spelling of 25580081 in words is "twenty-five million, five hundred eighty thousand, eighty-one".