115211312 has 40 divisors (see below), whose sum is σ = 242140752. Its totient is φ = 52889600.

The previous prime is 115211311. The next prime is 115211323. The reversal of 115211312 is 213112511.

It is a super-2 number, since 2×115211312² = 26547292825522688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (115211311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5987 + ... + 16317.

Almost surely, 2^115211312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 115211312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121070376).

115211312 is an abundant number, since it is smaller than the sum of its proper divisors (126929440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

115211312 is a wasteful number, since it uses less digits than its factorization.

115211312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10397 (or 10391 counting only the distinct ones).

The product of its digits is 60, while the sum is 17.

The square root of 115211312 is about 10733.6532457500. The cubic root of 115211312 is about 486.5920854832.

Adding to 115211312 its reverse (213112511), we get a palindrome (328323823).

The spelling of 115211312 in words is "one hundred fifteen million, two hundred eleven thousand, three hundred twelve".