115161511 has 4 divisors (see below), whose sum is σ = 115322400. Its totient is φ = 115000624.

The previous prime is 115161493. The next prime is 115161521.

115161511 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 115161511 - 2¹¹ = 115159463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115161521) 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, 79366 + ... + 80803.

It is an arithmetic number, because the mean of its divisors is an integer number (28830600).

Almost surely, 2^115161511 is an apocalyptic number.

115161511 is a deficient number, since it is larger than the sum of its proper divisors (160889).

115161511 is an equidigital number, since it uses as much as digits as its factorization.

115161511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160888.

The product of its digits is 150, while the sum is 22.

The square root of 115161511 is about 10731.3331417863. Note that the first 3 decimals coincide. The cubic root of 115161511 is about 486.5219642874.

The spelling of 115161511 in words is "one hundred fifteen million, one hundred sixty-one thousand, five hundred eleven".