211006491 has 8 divisors (see below), whose sum is σ = 290417664. Its totient is φ = 136133160.

The previous prime is 211006487. The next prime is 211006591. The reversal of 211006491 is 194600112.

211006491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 211006491 - 2² = 211006487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211006421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1134351 + ... + 1134536.

It is an arithmetic number, because the mean of its divisors is an integer number (36302208).

Almost surely, 2^211006491 is an apocalyptic number.

211006491 is a deficient number, since it is larger than the sum of its proper divisors (79411173).

211006491 is a wasteful number, since it uses less digits than its factorization.

211006491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2268921.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 211006491 is about 14526.0624740499. The cubic root of 211006491 is about 595.3402860130.

The spelling of 211006491 in words is "two hundred eleven million, six thousand, four hundred ninety-one".