831345155 has 4 divisors (see below), whose sum is σ = 997614192. Its totient is φ = 665076120.

The previous prime is 831345103. The next prime is 831345161. The reversal of 831345155 is 551543138.

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

It is not a de Polignac number, because 831345155 - 2⁶ = 831345091 is a prime.

It is a super-2 number, since 2×831345155² = 1382269533483948050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83134511 + ... + 83134520.

It is an arithmetic number, because the mean of its divisors is an integer number (249403548).

Almost surely, 2^831345155 is an apocalyptic number.

831345155 is a deficient number, since it is larger than the sum of its proper divisors (166269037).

831345155 is a wasteful number, since it uses less digits than its factorization.

831345155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166269036.

The product of its digits is 36000, while the sum is 35.

The square root of 831345155 is about 28833.0566364373. The cubic root of 831345155 is about 940.2870539492.

The spelling of 831345155 in words is "eight hundred thirty-one million, three hundred forty-five thousand, one hundred fifty-five".