231320827 has 2 divisors, whose sum is σ = 231320828. Its totient is φ = 231320826.

The previous prime is 231320809. The next prime is 231320833. The reversal of 231320827 is 728023132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231320827 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231320795 and 231320804.

It is not a weakly prime, because it can be changed into another prime (231320807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115660413 + 115660414.

It is an arithmetic number, because the mean of its divisors is an integer number (115660414).

Almost surely, 2^231320827 is an apocalyptic number.

231320827 is a deficient number, since it is larger than the sum of its proper divisors (1).

231320827 is an equidigital number, since it uses as much as digits as its factorization.

231320827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 231320827 is about 15209.2349248738. The cubic root of 231320827 is about 613.8631714187.

Adding to 231320827 its reverse (728023132), we get a palindrome (959343959).

The spelling of 231320827 in words is "two hundred thirty-one million, three hundred twenty thousand, eight hundred twenty-seven".