831238155 has 48 divisors (see below), whose sum is σ = 1597620960. Its totient is φ = 396403200.

The previous prime is 831238129. The next prime is 831238211. The reversal of 831238155 is 551832138.

It is not a de Polignac number, because 831238155 - 2⁶ = 831238091 is a prime.

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 47 ways as a sum of consecutive naturals, for example, 16431 + ... + 43959.

It is an arithmetic number, because the mean of its divisors is an integer number (33283770).

Almost surely, 2^831238155 is an apocalyptic number.

831238155 is a deficient number, since it is larger than the sum of its proper divisors (766382805).

831238155 is a wasteful number, since it uses less digits than its factorization.

831238155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27612 (or 27609 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 831238155 is about 28831.2010675934. The cubic root of 831238155 is about 940.2467116874.

The spelling of 831238155 in words is "eight hundred thirty-one million, two hundred thirty-eight thousand, one hundred fifty-five".