213666612 has 24 divisors (see below), whose sum is σ = 507007200. Its totient is φ = 70014816.

The previous prime is 213666589. The next prime is 213666617. The reversal of 213666612 is 216666312.

213666612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213666617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150187 + ... + 151602.

It is an arithmetic number, because the mean of its divisors is an integer number (21125300).

Almost surely, 2^213666612 is an apocalyptic number.

It is an amenable number.

213666612 is an abundant number, since it is smaller than the sum of its proper divisors (293340588).

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

213666612 is a wasteful number, since it uses less digits than its factorization.

213666612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301855 (or 301853 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 213666612 is about 14617.3394295953. The cubic root of 213666612 is about 597.8316286048.

The spelling of 213666612 in words is "two hundred thirteen million, six hundred sixty-six thousand, six hundred twelve".