115221529 has 16 divisors (see below), whose sum is σ = 129055680. Its totient is φ = 102228480.

The previous prime is 115221527. The next prime is 115221539. The reversal of 115221529 is 925122511.

It is not a de Polignac number, because 115221529 - 2¹ = 115221527 is a prime.

It is a Duffinian number.

Its product of digits (1800) is a multiple of the sum of its prime divisors (1800).

It is a junction number, because it is equal to n+sod(n) for n = 115221497 and 115221506.

It is not an unprimeable number, because it can be changed into a prime (115221527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74494 + ... + 76024.

It is an arithmetic number, because the mean of its divisors is an integer number (8065980).

Almost surely, 2^115221529 is an apocalyptic number.

115221529 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

115221529 is a deficient number, since it is larger than the sum of its proper divisors (13834151).

115221529 is a wasteful number, since it uses less digits than its factorization.

115221529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1800.

The product of its digits is 1800, while the sum is 28.

The square root of 115221529 is about 10734.1291682185. The cubic root of 115221529 is about 486.6064688057.

The spelling of 115221529 in words is "one hundred fifteen million, two hundred twenty-one thousand, five hundred twenty-nine".