81118202 has 16 divisors (see below), whose sum is σ = 133788672. Its totient is φ = 36580320.

The previous prime is 81118199. The next prime is 81118207. The reversal of 81118202 is 20281118.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (81118207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11723 + ... + 17310.

It is an arithmetic number, because the mean of its divisors is an integer number (8361792).

Almost surely, 2^81118202 is an apocalyptic number.

81118202 is a deficient number, since it is larger than the sum of its proper divisors (52670470).

81118202 is a wasteful number, since it uses less digits than its factorization.

81118202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29173.

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 81118202 is about 9006.5643838258. The cubic root of 81118202 is about 432.8852339641.

The spelling of 81118202 in words is "eighty-one million, one hundred eighteen thousand, two hundred two".