213220612 has 24 divisors (see below), whose sum is σ = 410870880. Its totient is φ = 96010560.

The previous prime is 213220583. The next prime is 213220619. The reversal of 213220612 is 216022312.

213220612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 213220612.

It is not an unprimeable number, because it can be changed into a prime (213220619) 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, 17937 + ... + 27352.

It is an arithmetic number, because the mean of its divisors is an integer number (17119620).

Almost surely, 2^213220612 is an apocalyptic number.

213220612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

213220612 is a deficient number, since it is larger than the sum of its proper divisors (197650268).

213220612 is a wasteful number, since it uses less digits than its factorization.

213220612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45411 (or 45409 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 213220612 is about 14602.0756058856. The cubic root of 213220612 is about 597.4153747670.

Adding to 213220612 its reverse (216022312), we get a palindrome (429242924).

The spelling of 213220612 in words is "two hundred thirteen million, two hundred twenty thousand, six hundred twelve".