210806812 has 12 divisors (see below), whose sum is σ = 377491576. Its totient is φ = 102952080.

The previous prime is 210806809. The next prime is 210806821. The reversal of 210806812 is 218608012.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 612639 + ... + 612982.

Almost surely, 2^210806812 is an apocalyptic number.

It is an amenable number.

210806812 is a deficient number, since it is larger than the sum of its proper divisors (166684764).

210806812 is a wasteful number, since it uses less digits than its factorization.

210806812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225668 (or 1225666 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 210806812 is about 14519.1877183264. The cubic root of 210806812 is about 595.1524332278.

The spelling of 210806812 in words is "two hundred ten million, eight hundred six thousand, eight hundred twelve".