115131222 has 48 divisors (see below), whose sum is σ = 263914560. Its totient is φ = 36172656.

The previous prime is 115131221. The next prime is 115131223. The reversal of 115131222 is 222131511.

It is an interprime number because it is at equal distance from previous prime (115131221) and next prime (115131223).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 115131195 and 115131204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115131221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76893 + ... + 78375.

It is an arithmetic number, because the mean of its divisors is an integer number (5498220).

Almost surely, 2^115131222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 115131222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131957280).

115131222 is an abundant number, since it is smaller than the sum of its proper divisors (148783338).

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

115131222 is a wasteful number, since it uses less digits than its factorization.

115131222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1737 (or 1734 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 115131222 is about 10729.9218077300. The cubic root of 115131222 is about 486.4793066443.

Adding to 115131222 its reverse (222131511), we get a palindrome (337262733).

The spelling of 115131222 in words is "one hundred fifteen million, one hundred thirty-one thousand, two hundred twenty-two".