25523831 has 2 divisors, whose sum is σ = 25523832. Its totient is φ = 25523830.

The previous prime is 25523809. The next prime is 25523837. The reversal of 25523831 is 13832552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25523831 - 2¹⁰ = 25522807 is a prime.

It is a super-2 number, since 2×25523831² = 1302931897833122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25523794 and 25523803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25523837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12761915 + 12761916.

It is an arithmetic number, because the mean of its divisors is an integer number (12761916).

Almost surely, 2^25523831 is an apocalyptic number.

25523831 is a deficient number, since it is larger than the sum of its proper divisors (1).

25523831 is an equidigital number, since it uses as much as digits as its factorization.

25523831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 29.

The square root of 25523831 is about 5052.1115387529. Note that the first 3 decimals coincide. The cubic root of 25523831 is about 294.4299284749.

The spelling of 25523831 in words is "twenty-five million, five hundred twenty-three thousand, eight hundred thirty-one".