213571212 has 12 divisors (see below), whose sum is σ = 498332856. Its totient is φ = 71190400.

The previous prime is 213571199. The next prime is 213571231. The reversal of 213571212 is 212175312.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×213571212² = 91225325190297888, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8898789 + ... + 8898812.

It is an arithmetic number, because the mean of its divisors is an integer number (41527738).

Almost surely, 2^213571212 is an apocalyptic number.

It is an amenable number.

213571212 is an abundant number, since it is smaller than the sum of its proper divisors (284761644).

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

213571212 is a wasteful number, since it uses less digits than its factorization.

213571212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17797608 (or 17797606 counting only the distinct ones).

The product of its digits is 840, while the sum is 24.

The square root of 213571212 is about 14614.0758175124. The cubic root of 213571212 is about 597.7426400833.

The spelling of 213571212 in words is "two hundred thirteen million, five hundred seventy-one thousand, two hundred twelve".