211984745 has 8 divisors (see below), whose sum is σ = 290721984. Its totient is φ = 145360944.

The previous prime is 211984733. The next prime is 211984777. The reversal of 211984745 is 547489112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211984745 - 2⁸ = 211984489 is a prime.

It is a super-2 number, since 2×211984745² = 89875064225430050, which contains 22 as substring.

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, 3028319 + ... + 3028388.

It is an arithmetic number, because the mean of its divisors is an integer number (36340248).

Almost surely, 2^211984745 is an apocalyptic number.

It is an amenable number.

211984745 is a deficient number, since it is larger than the sum of its proper divisors (78737239).

211984745 is an equidigital number, since it uses as much as digits as its factorization.

211984745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6056719.

The product of its digits is 80640, while the sum is 41.

The square root of 211984745 is about 14559.6959102860. The cubic root of 211984745 is about 596.2588933124.

The spelling of 211984745 in words is "two hundred eleven million, nine hundred eighty-four thousand, seven hundred forty-five".