115920331 has 4 divisors (see below), whose sum is σ = 122739192. Its totient is φ = 109101472.

The previous prime is 115920323. The next prime is 115920341. The reversal of 115920331 is 133029511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133029511 = 1399 ⋅95089.

It is a cyclic number.

It is not a de Polignac number, because 115920331 - 2³ = 115920323 is a prime.

It is a super-2 number, since 2×115920331² = 26875046278299122, 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 = 115920296 and 115920305.

It is not an unprimeable number, because it can be changed into a prime (115920341) 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, 3409405 + ... + 3409438.

It is an arithmetic number, because the mean of its divisors is an integer number (30684798).

Almost surely, 2^115920331 is an apocalyptic number.

115920331 is a deficient number, since it is larger than the sum of its proper divisors (6818861).

115920331 is an equidigital number, since it uses as much as digits as its factorization.

115920331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6818860.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 115920331 is about 10766.6304385355. The cubic root of 115920331 is about 487.5882194937.

Adding to 115920331 its reverse (133029511), we get a palindrome (248949842).

The spelling of 115920331 in words is "one hundred fifteen million, nine hundred twenty thousand, three hundred thirty-one".