115321831 has 4 divisors (see below), whose sum is σ = 115351992. Its totient is φ = 115291672.

The previous prime is 115321783. The next prime is 115321841. The reversal of 115321831 is 138123511.

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

It is a cyclic number.

It is not a de Polignac number, because 115321831 - 2²³ = 106933223 is a prime.

It is a super-2 number, since 2×115321831² = 26598249410385122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115321796 and 115321805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115321841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8341 + ... + 17326.

It is an arithmetic number, because the mean of its divisors is an integer number (28837998).

Almost surely, 2^115321831 is an apocalyptic number.

115321831 is a deficient number, since it is larger than the sum of its proper divisors (30161).

115321831 is an equidigital number, since it uses as much as digits as its factorization.

115321831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30160.

The product of its digits is 720, while the sum is 25.

The square root of 115321831 is about 10738.8002588744. The cubic root of 115321831 is about 486.7476271660.

The spelling of 115321831 in words is "one hundred fifteen million, three hundred twenty-one thousand, eight hundred thirty-one".