213312066 has 32 divisors (see below), whose sum is σ = 465991488. Its totient is φ = 64559040.

The previous prime is 213312037. The next prime is 213312079. The reversal of 213312066 is 660213312.

It is a happy number.

It is an unprimeable number.

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, 70660 + ... + 73616.

It is an arithmetic number, because the mean of its divisors is an integer number (14562234).

Almost surely, 2^213312066 is an apocalyptic number.

213312066 is an abundant number, since it is smaller than the sum of its proper divisors (252679422).

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

213312066 is a wasteful number, since it uses less digits than its factorization.

213312066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4066.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 213312066 is about 14605.2068112711. The cubic root of 213312066 is about 597.5007764793.

Adding to 213312066 its reverse (660213312), we get a palindrome (873525378).

The spelling of 213312066 in words is "two hundred thirteen million, three hundred twelve thousand, sixty-six".