115345221 has 32 divisors (see below), whose sum is σ = 168220800. Its totient is φ = 70017024.

The previous prime is 115345213. The next prime is 115345247. The reversal of 115345221 is 122543511.

It is a happy number.

It is not a de Polignac number, because 115345221 - 2³ = 115345213 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 115345191 and 115345200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115345201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 326581 + ... + 326933.

It is an arithmetic number, because the mean of its divisors is an integer number (5256900).

Almost surely, 2^115345221 is an apocalyptic number.

It is an amenable number.

115345221 is a deficient number, since it is larger than the sum of its proper divisors (52875579).

115345221 is a wasteful number, since it uses less digits than its factorization.

115345221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565.

The product of its digits is 1200, while the sum is 24.

The square root of 115345221 is about 10739.8892452390. The cubic root of 115345221 is about 486.7805329257.

Adding to 115345221 its reverse (122543511), we get a palindrome (237888732).

The spelling of 115345221 in words is "one hundred fifteen million, three hundred forty-five thousand, two hundred twenty-one".