115105431 has 8 divisors (see below), whose sum is σ = 175398784. Its totient is φ = 65774520.

The previous prime is 115105427. The next prime is 115105433. The reversal of 115105431 is 134501511.

It is a happy number.

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

It is not a de Polignac number, because 115105431 - 2² = 115105427 is a prime.

It is a super-3 number, since 3×115105431³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 5481211 = 115105431 / (1 + 1 + 5 + 1 + 0 + 5 + 4 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115105398 and 115105407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115105433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2740585 + ... + 2740626.

It is an arithmetic number, because the mean of its divisors is an integer number (21924848).

Almost surely, 2^115105431 is an apocalyptic number.

115105431 is a deficient number, since it is larger than the sum of its proper divisors (60293353).

115105431 is an equidigital number, since it uses as much as digits as its factorization.

115105431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5481221.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 115105431 is about 10728.7199143234. The cubic root of 115105431 is about 486.4429778808.

Adding to 115105431 its reverse (134501511), we get a palindrome (249606942).

The spelling of 115105431 in words is "one hundred fifteen million, one hundred five thousand, four hundred thirty-one".