831520051 has 2 divisors, whose sum is σ = 831520052. Its totient is φ = 831520050.

The previous prime is 831520033. The next prime is 831520069. The reversal of 831520051 is 150025138.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (831520033) and next prime (831520069).

It is a cyclic number.

It is not a de Polignac number, because 831520051 - 2⁹ = 831519539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 831519998 and 831520025.

It is not a weakly prime, because it can be changed into another prime (831520091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415760025 + 415760026.

It is an arithmetic number, because the mean of its divisors is an integer number (415760026).

Almost surely, 2^831520051 is an apocalyptic number.

831520051 is a deficient number, since it is larger than the sum of its proper divisors (1).

831520051 is an equidigital number, since it uses as much as digits as its factorization.

831520051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 831520051 is about 28836.0893846582. The cubic root of 831520051 is about 940.3529876201.

Adding to 831520051 its reverse (150025138), we get a palindrome (981545189).

The spelling of 831520051 in words is "eight hundred thirty-one million, five hundred twenty thousand, fifty-one".