81818106 has 16 divisors (see below), whose sum is σ = 169279200. Its totient is φ = 26332208.

The previous prime is 81818069. The next prime is 81818111. The reversal of 81818106 is 60181818.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234936 + ... + 235283.

It is an arithmetic number, because the mean of its divisors is an integer number (10579950).

Almost surely, 2^81818106 is an apocalyptic number.

81818106 is an abundant number, since it is smaller than the sum of its proper divisors (87461094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81818106 is a wasteful number, since it uses less digits than its factorization.

81818106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470253.

The product of its (nonzero) digits is 3072, while the sum is 33.

The square root of 81818106 is about 9045.3361463242. The cubic root of 81818106 is about 434.1266769746.

The spelling of 81818106 in words is "eighty-one million, eight hundred eighteen thousand, one hundred six".