25117331 has 6 divisors (see below), whose sum is σ = 25303140. Its totient is φ = 24932856.

The previous prime is 25117327. The next prime is 25117343. The reversal of 25117331 is 13371152.

It is not a de Polignac number, because 25117331 - 2² = 25117327 is a prime.

It is a super-2 number, since 2×25117331² = 1261760633127122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25117297 and 25117306.

It is not an unprimeable number, because it can be changed into a prime (25110331) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24140 + ... + 25158.

It is an arithmetic number, because the mean of its divisors is an integer number (4217190).

Almost surely, 2^25117331 is an apocalyptic number.

25117331 is a deficient number, since it is larger than the sum of its proper divisors (185809).

25117331 is an equidigital number, since it uses as much as digits as its factorization.

25117331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333 (or 1176 counting only the distinct ones).

The product of its digits is 630, while the sum is 23.

The square root of 25117331 is about 5011.7193656469. The cubic root of 25117331 is about 292.8584972941.

Adding to 25117331 its reverse (13371152), we get a palindrome (38488483).

The spelling of 25117331 in words is "twenty-five million, one hundred seventeen thousand, three hundred thirty-one".