115212171 has 4 divisors (see below), whose sum is σ = 153616232. Its totient is φ = 76808112.

The previous prime is 115212161. The next prime is 115212233. The reversal of 115212171 is 171212511.

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

It is not a de Polignac number, because 115212171 - 2⁶ = 115212107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115212121) 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, 19202026 + ... + 19202031.

It is an arithmetic number, because the mean of its divisors is an integer number (38404058).

Almost surely, 2^115212171 is an apocalyptic number.

115212171 is a deficient number, since it is larger than the sum of its proper divisors (38404061).

115212171 is an equidigital number, since it uses as much as digits as its factorization.

115212171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38404060.

The product of its digits is 140, while the sum is 21.

The square root of 115212171 is about 10733.6932600107. The cubic root of 115212171 is about 486.5932948018.

Adding to 115212171 its reverse (171212511), we get a palindrome (286424682).

The spelling of 115212171 in words is "one hundred fifteen million, two hundred twelve thousand, one hundred seventy-one".