36115231 has 4 divisors (see below), whose sum is σ = 36199072. Its totient is φ = 36031392.

The previous prime is 36115229. The next prime is 36115241. The reversal of 36115231 is 13251163.

It is a happy number.

36115231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13251163 = 2767 ⋅4789.

It is a cyclic number.

It is not a de Polignac number, because 36115231 - 2¹ = 36115229 is a prime.

It is a super-2 number, since 2×36115231² = 2608619820366722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36115241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41271 + ... + 42136.

It is an arithmetic number, because the mean of its divisors is an integer number (9049768).

Almost surely, 2^36115231 is an apocalyptic number.

36115231 is a deficient number, since it is larger than the sum of its proper divisors (83841).

36115231 is an equidigital number, since it uses as much as digits as its factorization.

36115231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83840.

The product of its digits is 540, while the sum is 22.

The square root of 36115231 is about 6009.5949114728. The cubic root of 36115231 is about 330.5446500191.

Adding to 36115231 its reverse (13251163), we get a palindrome (49366394).

The spelling of 36115231 in words is "thirty-six million, one hundred fifteen thousand, two hundred thirty-one".