212641986 has 8 divisors (see below), whose sum is σ = 425283984. Its totient is φ = 70880660.

The previous prime is 212641981. The next prime is 212641993. The reversal of 212641986 is 689146212.

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

212641986 is an admirable number.

It is a super-2 number, since 2×212641986² = 90433228420048392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212641981) 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, 17720160 + ... + 17720171.

It is an arithmetic number, because the mean of its divisors is an integer number (53160498).

Almost surely, 2^212641986 is an apocalyptic number.

212641986 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.

212641986 is a wasteful number, since it uses less digits than its factorization.

212641986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35440336.

The product of its digits is 41472, while the sum is 39.

The square root of 212641986 is about 14582.2490034974. The cubic root of 212641986 is about 596.8744745333.

The spelling of 212641986 in words is "two hundred twelve million, six hundred forty-one thousand, nine hundred eighty-six".