810109212 has 24 divisors (see below), whose sum is σ = 2062096512. Its totient is φ = 245487600.

The previous prime is 810109199. The next prime is 810109241. The reversal of 810109212 is 212901018.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3068464 + ... + 3068727.

It is an arithmetic number, because the mean of its divisors is an integer number (85920688).

Almost surely, 2^810109212 is an apocalyptic number.

It is an amenable number.

810109212 is an abundant number, since it is smaller than the sum of its proper divisors (1251987300).

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

810109212 is a wasteful number, since it uses less digits than its factorization.

810109212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6137209 (or 6137207 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 810109212 is about 28462.4175361124. The cubic root of 810109212 is about 932.2116446042.

The spelling of 810109212 in words is "eight hundred ten million, one hundred nine thousand, two hundred twelve".