25105081 has 4 divisors (see below), whose sum is σ = 25115392. Its totient is φ = 25094772.

The previous prime is 25105063. The next prime is 25105111. The reversal of 25105081 is 18050152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25105081 - 2⁵ = 25105049 is a prime.

It is a super-2 number, since 2×25105081² = 1260530184033122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25105181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 760 + ... + 7126.

It is an arithmetic number, because the mean of its divisors is an integer number (6278848).

Almost surely, 2^25105081 is an apocalyptic number.

It is an amenable number.

25105081 is a deficient number, since it is larger than the sum of its proper divisors (10311).

25105081 is an equidigital number, since it uses as much as digits as its factorization.

25105081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10310.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 25105081 is about 5010.4970811288. The cubic root of 25105081 is about 292.8108794431.

The spelling of 25105081 in words is "twenty-five million, one hundred five thousand, eighty-one".