115137481 has 4 divisors (see below), whose sum is σ = 121910292. Its totient is φ = 108364672.

The previous prime is 115137479. The next prime is 115137499. The reversal of 115137481 is 184731511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 184731511 = 31 ⋅5959081.

It can be written as a sum of positive squares in 2 ways, for example, as 97831881 + 17305600 = 9891^2 + 4160^2 .

It is a cyclic number.

It is not a de Polignac number, because 115137481 - 2¹ = 115137479 is a prime.

It is a super-2 number, since 2×115137481² = 26513279062050722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115137401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3386380 + ... + 3386413.

It is an arithmetic number, because the mean of its divisors is an integer number (30477573).

Almost surely, 2^115137481 is an apocalyptic number.

It is an amenable number.

115137481 is a deficient number, since it is larger than the sum of its proper divisors (6772811).

115137481 is an equidigital number, since it uses as much as digits as its factorization.

115137481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6772810.

The product of its digits is 3360, while the sum is 31.

The square root of 115137481 is about 10730.2134647918. The cubic root of 115137481 is about 486.4881221470.

Adding to 115137481 its reverse (184731511), we get a palindrome (299868992).

The spelling of 115137481 in words is "one hundred fifteen million, one hundred thirty-seven thousand, four hundred eighty-one".