25317953 has 4 divisors (see below), whose sum is σ = 26002260. Its totient is φ = 24633648.

The previous prime is 25317923. The next prime is 25317959. The reversal of 25317953 is 35971352.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17572864 + 7745089 = 4192^2 + 2783^2 .

It is a cyclic number.

It is not a de Polignac number, because 25317953 - 2⁶ = 25317889 is a prime.

It is a super-2 number, since 2×25317953² = 1281997488220418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25317959) 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, 342098 + ... + 342171.

It is an arithmetic number, because the mean of its divisors is an integer number (6500565).

Almost surely, 2^25317953 is an apocalyptic number.

It is an amenable number.

25317953 is a deficient number, since it is larger than the sum of its proper divisors (684307).

25317953 is an equidigital number, since it uses as much as digits as its factorization.

25317953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684306.

The product of its digits is 28350, while the sum is 35.

The square root of 25317953 is about 5031.6948436884. The cubic root of 25317953 is about 293.6361557943.

The spelling of 25317953 in words is "twenty-five million, three hundred seventeen thousand, nine hundred fifty-three".