212166490 has 16 divisors (see below), whose sum is σ = 398504448. Its totient is φ = 81176656.

The previous prime is 212166469. The next prime is 212166499. The reversal of 212166490 is 94661212.

It is not an unprimeable number, because it can be changed into a prime (212166499) 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, 461002 + ... + 461461.

It is an arithmetic number, because the mean of its divisors is an integer number (24906528).

Almost surely, 2^212166490 is an apocalyptic number.

212166490 is a deficient number, since it is larger than the sum of its proper divisors (186337958).

212166490 is a wasteful number, since it uses less digits than its factorization.

212166490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922493.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 212166490 is about 14565.9359465844. The cubic root of 212166490 is about 596.4292453785.

The spelling of 212166490 in words is "two hundred twelve million, one hundred sixty-six thousand, four hundred ninety".