115213129 has 4 divisors (see below), whose sum is σ = 115366084. Its totient is φ = 115060176.

The previous prime is 115213123. The next prime is 115213139. The reversal of 115213129 is 921312511.

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

It can be written as a sum of positive squares in 2 ways, for example, as 76125625 + 39087504 = 8725^2 + 6252^2 .

It is a cyclic number.

It is not a de Polignac number, because 115213129 - 2⁷ = 115213001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115213123) 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 3 ways as a sum of consecutive naturals, for example, 75342 + ... + 76855.

It is an arithmetic number, because the mean of its divisors is an integer number (28841521).

Almost surely, 2^115213129 is an apocalyptic number.

It is an amenable number.

115213129 is a deficient number, since it is larger than the sum of its proper divisors (152955).

115213129 is an equidigital number, since it uses as much as digits as its factorization.

115213129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152954.

The product of its digits is 540, while the sum is 25.

The square root of 115213129 is about 10733.7378857507. The cubic root of 115213129 is about 486.5946434877.

The spelling of 115213129 in words is "one hundred fifteen million, two hundred thirteen thousand, one hundred twenty-nine".