115531442 has 16 divisors (see below), whose sum is σ = 187739160. Its totient is φ = 53320176.

The previous prime is 115531441. The next prime is 115531453. The reversal of 115531442 is 244135511.

It can be written as a sum of positive squares in 4 ways, for example, as 31460881 + 84070561 = 5609^2 + 9169^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (115531441) 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, 8753 + ... + 17540.

Almost surely, 2^115531442 is an apocalyptic number.

115531442 is a deficient number, since it is larger than the sum of its proper divisors (72207718).

115531442 is an equidigital number, since it uses as much as digits as its factorization.

115531442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26334 (or 26308 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

The square root of 115531442 is about 10748.5553447894. Note that the first 3 decimals coincide. The cubic root of 115531442 is about 487.0423557026.

Adding to 115531442 its reverse (244135511), we get a palindrome (359666953).

The spelling of 115531442 in words is "one hundred fifteen million, five hundred thirty-one thousand, four hundred forty-two".