115857831 has 8 divisors (see below), whose sum is σ = 161193600. Its totient is φ = 73880312.

The previous prime is 115857829. The next prime is 115857853. The reversal of 115857831 is 138758511.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 115857831 - 2¹ = 115857829 is a prime.

It is a super-2 number, since 2×115857831² = 26846074008049122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 115857831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115857811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 839481 + ... + 839618.

It is an arithmetic number, because the mean of its divisors is an integer number (20149200).

Almost surely, 2^115857831 is an apocalyptic number.

115857831 is a deficient number, since it is larger than the sum of its proper divisors (45335769).

115857831 is a wasteful number, since it uses less digits than its factorization.

115857831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1679125.

The product of its digits is 33600, while the sum is 39.

The square root of 115857831 is about 10763.7275606548. The cubic root of 115857831 is about 487.5005738323.

The spelling of 115857831 in words is "one hundred fifteen million, eight hundred fifty-seven thousand, eight hundred thirty-one".