115220015 has 4 divisors (see below), whose sum is σ = 138264024. Its totient is φ = 92176008.

The previous prime is 115220011. The next prime is 115220029. The reversal of 115220015 is 510022511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 115220015 - 2² = 115220011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115219975 and 115220002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115220011) 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 3 ways as a sum of consecutive naturals, for example, 11521997 + ... + 11522006.

It is an arithmetic number, because the mean of its divisors is an integer number (34566006).

Almost surely, 2^115220015 is an apocalyptic number.

115220015 is a deficient number, since it is larger than the sum of its proper divisors (23044009).

115220015 is an equidigital number, since it uses as much as digits as its factorization.

115220015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23044008.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 115220015 is about 10734.0586452655. The cubic root of 115220015 is about 486.6043374754.

Adding to 115220015 its reverse (510022511), we get a palindrome (625242526).

The spelling of 115220015 in words is "one hundred fifteen million, two hundred twenty thousand, fifteen".