131366818 has 16 divisors (see below), whose sum is σ = 217054656. Its totient is φ = 59131440.

The previous prime is 131366813. The next prime is 131366819. The reversal of 131366818 is 818663131.

It is not an unprimeable number, because it can be changed into a prime (131366813) 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 7 ways as a sum of consecutive naturals, for example, 26721 + ... + 31252.

It is an arithmetic number, because the mean of its divisors is an integer number (13565916).

Almost surely, 2^131366818 is an apocalyptic number.

131366818 is a deficient number, since it is larger than the sum of its proper divisors (85687838).

131366818 is a wasteful number, since it uses less digits than its factorization.

131366818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58089.

The product of its digits is 20736, while the sum is 37.

The square root of 131366818 is about 11461.5364589570. The cubic root of 131366818 is about 508.3489062565.

The spelling of 131366818 in words is "one hundred thirty-one million, three hundred sixty-six thousand, eight hundred eighteen".