115343221 has 4 divisors (see below), whose sum is σ = 131820832. Its totient is φ = 98865612.

The previous prime is 115343213. The next prime is 115343231. The reversal of 115343221 is 122343511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122343511 = 181 ⋅675931.

It is a cyclic number.

It is not a de Polignac number, because 115343221 - 2³ = 115343213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115343192 and 115343201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115343231) 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, 8238795 + ... + 8238808.

It is an arithmetic number, because the mean of its divisors is an integer number (32955208).

Almost surely, 2^115343221 is an apocalyptic number.

It is an amenable number.

115343221 is a deficient number, since it is larger than the sum of its proper divisors (16477611).

115343221 is an equidigital number, since it uses as much as digits as its factorization.

115343221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16477610.

The product of its digits is 720, while the sum is 22.

The square root of 115343221 is about 10739.7961340055. The cubic root of 115343221 is about 486.7777194391. Note that the first 4 decimals are identical.

Adding to 115343221 its reverse (122343511), we get a palindrome (237686732).

The spelling of 115343221 in words is "one hundred fifteen million, three hundred forty-three thousand, two hundred twenty-one".