213305012 has 6 divisors (see below), whose sum is σ = 373283778. Its totient is φ = 106652504.

The previous prime is 213304979. The next prime is 213305033. The reversal of 213305012 is 210503312.

It can be written as a sum of positive squares in only one way, i.e., 198359056 + 14945956 = 14084^2 + 3866^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26663123 + ... + 26663130.

It is an arithmetic number, because the mean of its divisors is an integer number (62213963).

Almost surely, 2^213305012 is an apocalyptic number.

It is an amenable number.

213305012 is a deficient number, since it is larger than the sum of its proper divisors (159978766).

213305012 is a wasteful number, since it uses less digits than its factorization.

213305012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53326257 (or 53326255 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 213305012 is about 14604.9653200547. The cubic root of 213305012 is about 597.4941901713.

Adding to 213305012 its reverse (210503312), we get a palindrome (423808324).

It can be divided in two parts, 21 and 3305012, that added together give a palindrome (3305033).

The spelling of 213305012 in words is "two hundred thirteen million, three hundred five thousand, twelve".