25312005 has 24 divisors (see below), whose sum is σ = 44706168. Its totient is φ = 13243776.

The previous prime is 25311967. The next prime is 25312019. The reversal of 25312005 is 50021352.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13264164 + 12047841 = 3642^2 + 3471^2 .

It is not a de Polignac number, because 25312005 - 2⁸ = 25311749 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2922 + ... + 7691.

It is an arithmetic number, because the mean of its divisors is an integer number (1862757).

Almost surely, 2^25312005 is an apocalyptic number.

It is an amenable number.

25312005 is a deficient number, since it is larger than the sum of its proper divisors (19394163).

25312005 is a wasteful number, since it uses less digits than its factorization.

25312005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10677 (or 10674 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 25312005 is about 5031.1037556385. The cubic root of 25312005 is about 293.6131591399.

Adding to 25312005 its reverse (50021352), we get a palindrome (75333357).

The spelling of 25312005 in words is "twenty-five million, three hundred twelve thousand, five".