831481345 has 4 divisors (see below), whose sum is σ = 997777620. Its totient is φ = 665185072.

The previous prime is 831481333. The next prime is 831481351. The reversal of 831481345 is 543184138.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 571401216 + 260080129 = 23904^2 + 16127^2 .

It is a cyclic number.

It is not a de Polignac number, because 831481345 - 2⁹ = 831480833 is a prime.

It is a super-2 number, since 2×831481345² = 1382722454166018050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83148130 + ... + 83148139.

It is an arithmetic number, because the mean of its divisors is an integer number (249444405).

Almost surely, 2^831481345 is an apocalyptic number.

It is an amenable number.

831481345 is a deficient number, since it is larger than the sum of its proper divisors (166296275).

831481345 is a wasteful number, since it uses less digits than its factorization.

831481345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166296274.

The product of its digits is 46080, while the sum is 37.

The square root of 831481345 is about 28835.4182386869. The cubic root of 831481345 is about 940.3383967242.

The spelling of 831481345 in words is "eight hundred thirty-one million, four hundred eighty-one thousand, three hundred forty-five".