115511321 has 8 divisors (see below), whose sum is σ = 121521600. Its totient is φ = 109636240.

The previous prime is 115511293. The next prime is 115511323. The reversal of 115511321 is 123115511.

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 115511321 - 2⁶ = 115511257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 115511293 and 115511302.

It is not an unprimeable number, because it can be changed into a prime (115511323) 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 7 ways as a sum of consecutive naturals, for example, 32045 + ... + 35466.

It is an arithmetic number, because the mean of its divisors is an integer number (15190200).

Almost surely, 2^115511321 is an apocalyptic number.

It is an amenable number.

115511321 is a deficient number, since it is larger than the sum of its proper divisors (6010279).

115511321 is an equidigital number, since it uses as much as digits as its factorization.

115511321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67599.

The product of its digits is 150, while the sum is 20.

The square root of 115511321 is about 10747.6193177838. The cubic root of 115511321 is about 487.0140795669.

Adding to 115511321 its reverse (123115511), we get a palindrome (238626832).

The spelling of 115511321 in words is "one hundred fifteen million, five hundred eleven thousand, three hundred twenty-one".