213222708 has 18 divisors (see below), whose sum is σ = 538979714. Its totient is φ = 71074224.

The previous prime is 213222683. The next prime is 213222787. The reversal of 213222708 is 807222312.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 213101604 + 121104 = 14598^2 + 348^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent 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 5 ways as a sum of consecutive naturals, for example, 2961391 + ... + 2961462.

Almost surely, 2^213222708 is an apocalyptic number.

It is an amenable number.

213222708 is an abundant number, since it is smaller than the sum of its proper divisors (325757006).

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

213222708 is a wasteful number, since it uses less digits than its factorization.

213222708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5922863 (or 5922858 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 213222708 is about 14602.1473763279. The cubic root of 213222708 is about 597.4173323303.

The spelling of 213222708 in words is "two hundred thirteen million, two hundred twenty-two thousand, seven hundred eight".