25263731 has 2 divisors, whose sum is σ = 25263732. Its totient is φ = 25263730.

The previous prime is 25263713. The next prime is 25263773. The reversal of 25263731 is 13736252.

Together with previous prime (25263713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25263731 is a prime.

It is a super-2 number, since 2×25263731² = 1276512208080722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25263694 and 25263703.

It is not a weakly prime, because it can be changed into another prime (25263701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12631865 + 12631866.

It is an arithmetic number, because the mean of its divisors is an integer number (12631866).

Almost surely, 2^25263731 is an apocalyptic number.

25263731 is a deficient number, since it is larger than the sum of its proper divisors (1).

25263731 is an equidigital number, since it uses as much as digits as its factorization.

25263731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 29.

The square root of 25263731 is about 5026.3039104296. The cubic root of 25263731 is about 293.4263847639.

Adding to 25263731 its reverse (13736252), we get a palindrome (38999983).

The spelling of 25263731 in words is "twenty-five million, two hundred sixty-three thousand, seven hundred thirty-one".