115138533 has 4 divisors (see below), whose sum is σ = 153518048. Its totient is φ = 76759020.

The previous prime is 115138531. The next prime is 115138547. The reversal of 115138533 is 335831511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 115138533 - 2¹ = 115138531 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115138533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115138531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19189753 + ... + 19189758.

It is an arithmetic number, because the mean of its divisors is an integer number (38379512).

Almost surely, 2^115138533 is an apocalyptic number.

It is an amenable number.

115138533 is a deficient number, since it is larger than the sum of its proper divisors (38379515).

115138533 is an equidigital number, since it uses as much as digits as its factorization.

115138533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38379514.

The product of its digits is 5400, while the sum is 30.

The square root of 115138533 is about 10730.2624851399. The cubic root of 115138533 is about 486.4896038074.

The spelling of 115138533 in words is "one hundred fifteen million, one hundred thirty-eight thousand, five hundred thirty-three".