806522172 has 12 divisors (see below), whose sum is σ = 1881885096. Its totient is φ = 268840720.

The previous prime is 806522159. The next prime is 806522179. The reversal of 806522172 is 271225608.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806522179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33605079 + ... + 33605102.

It is an arithmetic number, because the mean of its divisors is an integer number (156823758).

Almost surely, 2^806522172 is an apocalyptic number.

It is an amenable number.

806522172 is an abundant number, since it is smaller than the sum of its proper divisors (1075362924).

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

806522172 is a wasteful number, since it uses less digits than its factorization.

806522172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67210188 (or 67210186 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 806522172 is about 28399.3340062756. The cubic root of 806522172 is about 930.8337118588.

The spelling of 806522172 in words is "eight hundred six million, five hundred twenty-two thousand, one hundred seventy-two".