212797806 has 32 divisors (see below), whose sum is σ = 485297568. Its totient is φ = 61624320.

The previous prime is 212797801. The next prime is 212797861. The reversal of 212797806 is 608797212.

212797806 = T₄₉₉₅ + T₄₉₉₆ + ... + T₅₀₁₁.

212797806 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212797801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78915 + ... + 81566.

It is an arithmetic number, because the mean of its divisors is an integer number (15165549).

Almost surely, 2^212797806 is an apocalyptic number.

212797806 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

212797806 is an abundant number, since it is smaller than the sum of its proper divisors (272499762).

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

212797806 is a wasteful number, since it uses less digits than its factorization.

212797806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160516.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 212797806 is about 14587.5908223394. The cubic root of 212797806 is about 597.0202316878.

The spelling of 212797806 in words is "two hundred twelve million, seven hundred ninety-seven thousand, eight hundred six".