25323731 has 2 divisors, whose sum is σ = 25323732. Its totient is φ = 25323730.

The previous prime is 25323721. The next prime is 25323733. The reversal of 25323731 is 13732352.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25323731 is a prime.

It is a super-2 number, since 2×25323731² = 1282582703520722, which contains 22 as substring.

Together with 25323733, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25323731.

It is not a weakly prime, because it can be changed into another prime (25323733) 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 as a sum of consecutive naturals, namely, 12661865 + 12661866.

It is an arithmetic number, because the mean of its divisors is an integer number (12661866).

Almost surely, 2^25323731 is an apocalyptic number.

25323731 is a deficient number, since it is larger than the sum of its proper divisors (1).

25323731 is an equidigital number, since it uses as much as digits as its factorization.

25323731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 26.

The square root of 25323731 is about 5032.2689713488. The cubic root of 25323731 is about 293.6584917319.

The spelling of 25323731 in words is "twenty-five million, three hundred twenty-three thousand, seven hundred thirty-one".