831528161 has 2 divisors, whose sum is σ = 831528162. Its totient is φ = 831528160.

The previous prime is 831528143. The next prime is 831528169. The reversal of 831528161 is 161825138.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 531025936 + 300502225 = 23044^2 + 17335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-831528161 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (831528169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415764080 + 415764081.

It is an arithmetic number, because the mean of its divisors is an integer number (415764081).

Almost surely, 2^831528161 is an apocalyptic number.

It is an amenable number.

831528161 is a deficient number, since it is larger than the sum of its proper divisors (1).

831528161 is an equidigital number, since it uses as much as digits as its factorization.

831528161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 35.

The square root of 831528161 is about 28836.2300067120. The cubic root of 831528161 is about 940.3560447674.

The spelling of 831528161 in words is "eight hundred thirty-one million, five hundred twenty-eight thousand, one hundred sixty-one".