211131320 has 32 divisors (see below), whose sum is σ = 475474320. Its totient is φ = 84376320.

The previous prime is 211131307. The next prime is 211131331. The reversal of 211131320 is 23131112.

It is a junction number, because it is equal to n+sod(n) for n = 211131295 and 211131304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68615 + ... + 71625.

Almost surely, 2^211131320 is an apocalyptic number.

211131320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211131320 is an abundant number, since it is smaller than the sum of its proper divisors (264343000).

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

211131320 is a wasteful number, since it uses less digits than its factorization.

211131320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4775 (or 4771 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 211131320 is about 14530.3585640548. The cubic root of 211131320 is about 595.4576616796.

Adding to 211131320 its reverse (23131112), we get a palindrome (234262432).

The spelling of 211131320 in words is "two hundred eleven million, one hundred thirty-one thousand, three hundred twenty".