831478155 has 16 divisors (see below), whose sum is σ = 1362813984. Its totient is φ = 432638720.

The previous prime is 831478121. The next prime is 831478163. The reversal of 831478155 is 551874138.

It is not a de Polignac number, because 831478155 - 2⁹ = 831477643 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 675384 + ... + 676613.

It is an arithmetic number, because the mean of its divisors is an integer number (85175874).

Almost surely, 2^831478155 is an apocalyptic number.

831478155 is a deficient number, since it is larger than the sum of its proper divisors (531335829).

831478155 is a wasteful number, since it uses less digits than its factorization.

831478155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352046.

The product of its digits is 134400, while the sum is 42.

The square root of 831478155 is about 28835.3629247145. The cubic root of 831478155 is about 940.3371941783.

The spelling of 831478155 in words is "eight hundred thirty-one million, four hundred seventy-eight thousand, one hundred fifty-five".