212863647 has 16 divisors (see below), whose sum is σ = 301024512. Its totient is φ = 133334400.

The previous prime is 212863633. The next prime is 212863649. The reversal of 212863647 is 746368212.

It is a happy number.

It is not a de Polignac number, because 212863647 - 2¹⁵ = 212830879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212863649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29772 + ... + 36222.

It is an arithmetic number, because the mean of its divisors is an integer number (18814032).

Almost surely, 2^212863647 is an apocalyptic number.

212863647 is a deficient number, since it is larger than the sum of its proper divisors (88160865).

212863647 is a wasteful number, since it uses less digits than its factorization.

212863647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7118.

The product of its digits is 96768, while the sum is 39.

The square root of 212863647 is about 14589.8473946783. The cubic root of 212863647 is about 597.0817992958.

The spelling of 212863647 in words is "two hundred twelve million, eight hundred sixty-three thousand, six hundred forty-seven".