212133663 has 24 divisors (see below), whose sum is σ = 358337408. Its totient is φ = 118398672.

The previous prime is 212133643. The next prime is 212133673. The reversal of 212133663 is 366331212.

It is a happy number.

It is not a de Polignac number, because 212133663 - 2⁹ = 212133151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212133643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36445 + ... + 41862.

Almost surely, 2^212133663 is an apocalyptic number.

212133663 is a deficient number, since it is larger than the sum of its proper divisors (146203745).

212133663 is a wasteful number, since it uses less digits than its factorization.

212133663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78363 (or 78360 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 212133663 is about 14564.8090615703. The cubic root of 212133663 is about 596.3984833847.

Adding to 212133663 its reverse (366331212), we get a palindrome (578464875).

The spelling of 212133663 in words is "two hundred twelve million, one hundred thirty-three thousand, six hundred sixty-three".