25783231 has 2 divisors, whose sum is σ = 25783232. Its totient is φ = 25783230.

The previous prime is 25783229. The next prime is 25783243. The reversal of 25783231 is 13238752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25783231 - 2¹ = 25783229 is a prime.

It is a super-2 number, since 2×25783231² = 1329550001598722, which contains 22 as substring.

Together with 25783229, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 25783193 and 25783202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25783201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12891615 + 12891616.

It is an arithmetic number, because the mean of its divisors is an integer number (12891616).

Almost surely, 2^25783231 is an apocalyptic number.

25783231 is a deficient number, since it is larger than the sum of its proper divisors (1).

25783231 is an equidigital number, since it uses as much as digits as its factorization.

25783231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 31.

The square root of 25783231 is about 5077.7190745452. The cubic root of 25783231 is about 295.4240039034.

The spelling of 25783231 in words is "twenty-five million, seven hundred eighty-three thousand, two hundred thirty-one".