212040806 has 12 divisors (see below), whose sum is σ = 328655196. Its totient is φ = 102599460.

The previous prime is 212040799. The next prime is 212040827. The reversal of 212040806 is 608040212.

It is a super-2 number, since 2×212040806² = 89922606818259272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53240 + ... + 57083.

It is an arithmetic number, because the mean of its divisors is an integer number (27387933).

Almost surely, 2^212040806 is an apocalyptic number.

212040806 is a deficient number, since it is larger than the sum of its proper divisors (116614390).

212040806 is a wasteful number, since it uses less digits than its factorization.

212040806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110387 (or 110356 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 212040806 is about 14561.6209949305. The cubic root of 212040806 is about 596.3114504333.

The spelling of 212040806 in words is "two hundred twelve million, forty thousand, eight hundred six".