25116681 has 4 divisors (see below), whose sum is σ = 33488912. Its totient is φ = 16744452.

The previous prime is 25116677. The next prime is 25116683. The reversal of 25116681 is 18661152.

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.

It is not a de Polignac number, because 25116681 - 2² = 25116677 is a prime.

It is a super-2 number, since 2×25116681² = 1261695328911522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25116683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4186111 + ... + 4186116.

It is an arithmetic number, because the mean of its divisors is an integer number (8372228).

Almost surely, 2^25116681 is an apocalyptic number.

It is an amenable number.

25116681 is a deficient number, since it is larger than the sum of its proper divisors (8372231).

25116681 is an equidigital number, since it uses as much as digits as its factorization.

25116681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8372230.

The product of its digits is 2880, while the sum is 30.

The square root of 25116681 is about 5011.6545172228. The cubic root of 25116681 is about 292.8559710216.

The spelling of 25116681 in words is "twenty-five million, one hundred sixteen thousand, six hundred eighty-one".