825500831 has 2 divisors, whose sum is σ = 825500832. Its totient is φ = 825500830.

The previous prime is 825500789. The next prime is 825500833. The reversal of 825500831 is 138005528.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-825500831 is a prime.

It is a super-2 number, since 2×825500831² = 1362903243963381122, which contains 22 as substring.

Together with 825500833, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (825500833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412750415 + 412750416.

It is an arithmetic number, because the mean of its divisors is an integer number (412750416).

Almost surely, 2^825500831 is an apocalyptic number.

825500831 is a deficient number, since it is larger than the sum of its proper divisors (1).

825500831 is an equidigital number, since it uses as much as digits as its factorization.

825500831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 825500831 is about 28731.5302585853. The cubic root of 825500831 is about 938.0784766653.

The spelling of 825500831 in words is "eight hundred twenty-five million, five hundred thousand, eight hundred thirty-one".