212166149 has 6 divisors (see below), whose sum is σ = 229742226. Its totient is φ = 195845520.

The previous prime is 212166133. The next prime is 212166167. The reversal of 212166149 is 941661212.

It can be written as a sum of positive squares in 3 ways, for example, as 5094049 + 207072100 = 2257^2 + 14390^2 .

It is not a de Polignac number, because 212166149 - 2⁴ = 212166133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212166109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 627542 + ... + 627879.

It is an arithmetic number, because the mean of its divisors is an integer number (38290371).

Almost surely, 2^212166149 is an apocalyptic number.

It is an amenable number.

212166149 is a deficient number, since it is larger than the sum of its proper divisors (17576077).

212166149 is a wasteful number, since it uses less digits than its factorization.

212166149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255447 (or 1255434 counting only the distinct ones).

The product of its digits is 5184, while the sum is 32.

The square root of 212166149 is about 14565.9242411870. The cubic root of 212166149 is about 596.4289258456.

The spelling of 212166149 in words is "two hundred twelve million, one hundred sixty-six thousand, one hundred forty-nine".