115138611 has 16 divisors (see below), whose sum is σ = 194944000. Its totient is φ = 65793384.

The previous prime is 115138607. The next prime is 115138643. The reversal of 115138611 is 116831511.

It is a happy number.

115138611 is a `hidden beast` number, since 1 + 15 + 1 + 38 + 611 = 666.

It is not a de Polignac number, because 115138611 - 2² = 115138607 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115138411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304411 + ... + 304788.

It is an arithmetic number, because the mean of its divisors is an integer number (12184000).

Almost surely, 2^115138611 is an apocalyptic number.

115138611 is a deficient number, since it is larger than the sum of its proper divisors (79805389).

115138611 is an equidigital number, since it uses as much as digits as its factorization.

115138611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609215 (or 609209 counting only the distinct ones).

The product of its digits is 720, while the sum is 27.

The square root of 115138611 is about 10730.2661197195. The cubic root of 115138611 is about 486.4897136640.

The spelling of 115138611 in words is "one hundred fifteen million, one hundred thirty-eight thousand, six hundred eleven".