211920312 has 32 divisors (see below), whose sum is σ = 544122000. Its totient is φ = 68730624.

The previous prime is 211920287. The next prime is 211920347. The reversal of 211920312 is 213029112.

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 7 ways as a sum of consecutive naturals, for example, 118437 + ... + 120212.

Almost surely, 2^211920312 is an apocalyptic number.

It is an amenable number.

211920312 is an abundant number, since it is smaller than the sum of its proper divisors (332201688).

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

211920312 is a wasteful number, since it uses less digits than its factorization.

211920312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238695 (or 238691 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 211920312 is about 14557.4830242044. The cubic root of 211920312 is about 596.1984760052.

Adding to 211920312 its reverse (213029112), we get a palindrome (424949424).

The spelling of 211920312 in words is "two hundred eleven million, nine hundred twenty thousand, three hundred twelve".