115216081 has 4 divisors (see below), whose sum is σ = 116935792. Its totient is φ = 113496372.

The previous prime is 115216067. The next prime is 115216091. The reversal of 115216081 is 180612511.

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: 180612511 = 59 ⋅3061229.

It is a cyclic number.

It is not a de Polignac number, because 115216081 - 2¹³ = 115207889 is a prime.

It is a super-2 number, since 2×115216081² = 26549490641997122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115216091) 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, 859755 + ... + 859888.

It is an arithmetic number, because the mean of its divisors is an integer number (29233948).

Almost surely, 2^115216081 is an apocalyptic number.

It is an amenable number.

115216081 is a deficient number, since it is larger than the sum of its proper divisors (1719711).

115216081 is an equidigital number, since it uses as much as digits as its factorization.

115216081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1719710.

The product of its (nonzero) digits is 480, while the sum is 25.

The square root of 115216081 is about 10733.8753952149. The cubic root of 115216081 is about 486.5987993078.

Adding to 115216081 its reverse (180612511), we get a palindrome (295828592).

The spelling of 115216081 in words is "one hundred fifteen million, two hundred sixteen thousand, eighty-one".