212166516 has 24 divisors (see below), whose sum is σ = 496248480. Its totient is φ = 70551712.

The previous prime is 212166499. The next prime is 212166517. The reversal of 212166516 is 615661212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212166517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16071 + ... + 26126.

It is an arithmetic number, because the mean of its divisors is an integer number (20677020).

Almost surely, 2^212166516 is an apocalyptic number.

It is an amenable number.

212166516 is an abundant number, since it is smaller than the sum of its proper divisors (284081964).

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

212166516 is a wasteful number, since it uses less digits than its factorization.

212166516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42623 (or 42621 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 212166516 is about 14565.9368390777. The cubic root of 212166516 is about 596.4292697416.

The spelling of 212166516 in words is "two hundred twelve million, one hundred sixty-six thousand, five hundred sixteen".