213245668 has 12 divisors (see below), whose sum is σ = 373408812. Its totient is φ = 106557440.

The previous prime is 213245663. The next prime is 213245687. The reversal of 213245668 is 866542312.

It can be written as a sum of positive squares in 2 ways, for example, as 197627364 + 15618304 = 14058^2 + 3952^2 .

It is not an unprimeable number, because it can be changed into a prime (213245663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8605 + ... + 22372.

It is an arithmetic number, because the mean of its divisors is an integer number (31117401).

Almost surely, 2^213245668 is an apocalyptic number.

It is an amenable number.

213245668 is a deficient number, since it is larger than the sum of its proper divisors (160163144).

213245668 is a wasteful number, since it uses less digits than its factorization.

213245668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32702 (or 32700 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 213245668 is about 14602.9335409020. The cubic root of 213245668 is about 597.4387750271.

The spelling of 213245668 in words is "two hundred thirteen million, two hundred forty-five thousand, six hundred sixty-eight".