211422320 has 40 divisors (see below), whose sum is σ = 493562160. Its totient is φ = 84224000.

The previous prime is 211422307. The next prime is 211422347. The reversal of 211422320 is 23224112.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14816 + ... + 25344.

It is an arithmetic number, because the mean of its divisors is an integer number (12339054).

Almost surely, 2^211422320 is an apocalyptic number.

211422320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211422320 is an abundant number, since it is smaller than the sum of its proper divisors (282139840).

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

211422320 is a wasteful number, since it uses less digits than its factorization.

211422320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10793 (or 10787 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 211422320 is about 14540.3686335663. The cubic root of 211422320 is about 595.7311070268.

Adding to 211422320 its reverse (23224112), we get a palindrome (234646432).

The spelling of 211422320 in words is "two hundred eleven million, four hundred twenty-two thousand, three hundred twenty".