212189946 has 8 divisors (see below), whose sum is σ = 424379904. Its totient is φ = 70729980.

The previous prime is 212189941. The next prime is 212189951. The reversal of 212189946 is 649981212.

It is an interprime number because it is at equal distance from previous prime (212189941) and next prime (212189951).

It is a sphenic number, since it is the product of 3 distinct primes.

212189946 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 212189898 and 212189907.

It is not an unprimeable number, because it can be changed into a prime (212189941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17682490 + ... + 17682501.

It is an arithmetic number, because the mean of its divisors is an integer number (53047488).

Almost surely, 2^212189946 is an apocalyptic number.

212189946 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

212189946 is a wasteful number, since it uses less digits than its factorization.

212189946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35364996.

The product of its digits is 62208, while the sum is 42.

The square root of 212189946 is about 14566.7410905803. The cubic root of 212189946 is about 596.4512239181.

The spelling of 212189946 in words is "two hundred twelve million, one hundred eighty-nine thousand, nine hundred forty-six".