212663885 has 16 divisors (see below), whose sum is σ = 291893376. Its totient is φ = 145706688.

The previous prime is 212663849. The next prime is 212663909. The reversal of 212663885 is 588366212.

It is a cyclic number.

It is not a de Polignac number, because 212663885 - 2⁶ = 212663821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 71447 + ... + 74363.

It is an arithmetic number, because the mean of its divisors is an integer number (18243336).

Almost surely, 2^212663885 is an apocalyptic number.

It is an amenable number.

212663885 is a deficient number, since it is larger than the sum of its proper divisors (79229491).

212663885 is a wasteful number, since it uses less digits than its factorization.

212663885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5012.

The product of its digits is 138240, while the sum is 41.

The square root of 212663885 is about 14582.9998628540. Note that the first 3 decimals coincide. The cubic root of 212663885 is about 596.8949635968.

The spelling of 212663885 in words is "two hundred twelve million, six hundred sixty-three thousand, eight hundred eighty-five".