211982380 has 24 divisors (see below), whose sum is σ = 446598432. Its totient is φ = 84519552.

The previous prime is 211982377. The next prime is 211982383. The reversal of 211982380 is 83289112.

It is an interprime number because it is at equal distance from previous prime (211982377) and next prime (211982383).

It is not an unprimeable number, because it can be changed into a prime (211982383) by changing a digit.

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, 10672 + ... + 23191.

It is an arithmetic number, because the mean of its divisors is an integer number (18608268).

Almost surely, 2^211982380 is an apocalyptic number.

211982380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211982380 is an abundant number, since it is smaller than the sum of its proper divisors (234616052).

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

211982380 is a wasteful number, since it uses less digits than its factorization.

211982380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34185 (or 34183 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 211982380 is about 14559.6146927039. The cubic root of 211982380 is about 596.2566759241.

The spelling of 211982380 in words is "two hundred eleven million, nine hundred eighty-two thousand, three hundred eighty".