212148189 has 12 divisors (see below), whose sum is σ = 334294272. Its totient is φ = 128574600.

The previous prime is 212148187. The next prime is 212148191. The reversal of 212148189 is 981841212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (212148187) and next prime (212148191).

It is not a de Polignac number, because 212148189 - 2¹ = 212148187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212148187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1071357 + ... + 1071554.

It is an arithmetic number, because the mean of its divisors is an integer number (27857856).

Almost surely, 2^212148189 is an apocalyptic number.

It is an amenable number.

212148189 is a deficient number, since it is larger than the sum of its proper divisors (122146083).

212148189 is a wasteful number, since it uses less digits than its factorization.

212148189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142928 (or 2142925 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 212148189 is about 14565.3077207452. The cubic root of 212148189 is about 596.4120960076.

It can be divided in two parts, 21214 and 8189, that added together give a triangular number (29403 = T₂₄₂).

The spelling of 212148189 in words is "two hundred twelve million, one hundred forty-eight thousand, one hundred eighty-nine".