136231815 has 32 divisors (see below), whose sum is σ = 221276160. Its totient is φ = 71565696.

The previous prime is 136231813. The next prime is 136231819. The reversal of 136231815 is 518132631.

It is not a de Polignac number, because 136231815 - 2¹ = 136231813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136231813) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 464809 + ... + 465101.

It is an arithmetic number, because the mean of its divisors is an integer number (6914880).

Almost surely, 2^136231815 is an apocalyptic number.

136231815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

136231815 is a deficient number, since it is larger than the sum of its proper divisors (85044345).

136231815 is a wasteful number, since it uses less digits than its factorization.

136231815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663.

The product of its digits is 4320, while the sum is 30.

The square root of 136231815 is about 11671.8385441198. The cubic root of 136231815 is about 514.5483393550.

The spelling of 136231815 in words is "one hundred thirty-six million, two hundred thirty-one thousand, eight hundred fifteen".