118231815 has 32 divisors (see below), whose sum is σ = 204696576. Its totient is φ = 57928320.

The previous prime is 118231801. The next prime is 118231819. The reversal of 118231815 is 518132811.

It is not a de Polignac number, because 118231815 - 2⁸ = 118231559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118231819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42930 + ... + 45600.

It is an arithmetic number, because the mean of its divisors is an integer number (6396768).

Almost surely, 2^118231815 is an apocalyptic number.

118231815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

118231815 is a deficient number, since it is larger than the sum of its proper divisors (86464761).

118231815 is a wasteful number, since it uses less digits than its factorization.

118231815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2919.

The product of its digits is 1920, while the sum is 30.

The square root of 118231815 is about 10873.4454061259. The cubic root of 118231815 is about 490.8077957074.

The spelling of 118231815 in words is "one hundred eighteen million, two hundred thirty-one thousand, eight hundred fifteen".