213221308 has 12 divisors (see below), whose sum is σ = 373310560. Its totient is φ = 106561152.

The previous prime is 213221251. The next prime is 213221377. The reversal of 213221308 is 803122312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1653 + ... + 20716.

Almost surely, 2^213221308 is an apocalyptic number.

It is an amenable number.

213221308 is a deficient number, since it is larger than the sum of its proper divisors (160089252).

213221308 is a wasteful number, since it uses less digits than its factorization.

213221308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24756 (or 24754 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 213221308 is about 14602.0994380945. The cubic root of 213221308 is about 597.4160247990.

The spelling of 213221308 in words is "two hundred thirteen million, two hundred twenty-one thousand, three hundred eight".