115191031 has 8 divisors (see below), whose sum is σ = 124562880. Its totient is φ = 106107648.

The previous prime is 115191001. The next prime is 115191047. The reversal of 115191031 is 130191511.

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 115191031 - 2⁷ = 115190903 is a prime.

It is a super-2 number, since 2×115191031² = 26537947245685922, 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 = 115190993 and 115191011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115191001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71286 + ... + 72883.

It is an arithmetic number, because the mean of its divisors is an integer number (15570360).

Almost surely, 2^115191031 is an apocalyptic number.

115191031 is a deficient number, since it is larger than the sum of its proper divisors (9371849).

115191031 is a wasteful number, since it uses less digits than its factorization.

115191031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144233.

The product of its (nonzero) digits is 135, while the sum is 22.

The square root of 115191031 is about 10732.7084652477. The cubic root of 115191031 is about 486.5635317094.

The spelling of 115191031 in words is "one hundred fifteen million, one hundred ninety-one thousand, thirty-one".