212163706 has 8 divisors (see below), whose sum is σ = 336965940. Its totient is φ = 99841728.

The previous prime is 212163697. The next prime is 212163713. The reversal of 212163706 is 607361212.

It can be written as a sum of positive squares in 2 ways, for example, as 201214225 + 10949481 = 14185^2 + 3309^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 3120021 + ... + 3120088.

Almost surely, 2^212163706 is an apocalyptic number.

212163706 is a deficient number, since it is larger than the sum of its proper divisors (124802234).

212163706 is a wasteful number, since it uses less digits than its factorization.

212163706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6240128.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 212163706 is about 14565.8403808363. The cubic root of 212163706 is about 596.4266366311.

The spelling of 212163706 in words is "two hundred twelve million, one hundred sixty-three thousand, seven hundred six".