212197072 has 20 divisors (see below), whose sum is σ = 422244676. Its totient is φ = 103230720.

The previous prime is 212197039. The next prime is 212197121. The reversal of 212197072 is 270791212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 168584256 + 43612816 = 12984^2 + 6604^2 .

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, 178629 + ... + 179812.

Almost surely, 2^212197072 is an apocalyptic number.

It is an amenable number.

212197072 is a deficient number, since it is larger than the sum of its proper divisors (210047604).

212197072 is a wasteful number, since it uses less digits than its factorization.

212197072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358486 (or 358480 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 212197072 is about 14566.9856868194. The cubic root of 212197072 is about 596.4579007407.

The spelling of 212197072 in words is "two hundred twelve million, one hundred ninety-seven thousand, seventy-two".