213281912 has 16 divisors (see below), whose sum is σ = 410712360. Its totient is φ = 103758624.

The previous prime is 213281903. The next prime is 213281917. The reversal of 213281912 is 219182312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213281917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359978 + ... + 360569.

Almost surely, 2^213281912 is an apocalyptic number.

It is an amenable number.

213281912 is a deficient number, since it is larger than the sum of its proper divisors (197430448).

213281912 is a wasteful number, since it uses less digits than its factorization.

213281912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720590 (or 720586 counting only the distinct ones).

The product of its digits is 1728, while the sum is 29.

The square root of 213281912 is about 14604.1744717050. The cubic root of 213281912 is about 597.4726207233.

The spelling of 213281912 in words is "two hundred thirteen million, two hundred eighty-one thousand, nine hundred twelve".