211043997 has 12 divisors (see below), whose sum is σ = 308701120. Its totient is φ = 138914568.

The previous prime is 211043993. The next prime is 211043999. The reversal of 211043997 is 799340112.

211043997 is a `hidden beast` number, since 211 + 0 + 439 + 9 + 7 = 666.

It is not a de Polignac number, because 211043997 - 2² = 211043993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211043993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147703 + ... + 149124.

Almost surely, 2^211043997 is an apocalyptic number.

It is an amenable number.

211043997 is a deficient number, since it is larger than the sum of its proper divisors (97657123).

211043997 is a wasteful number, since it uses less digits than its factorization.

211043997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296912 (or 296909 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 211043997 is about 14527.3534065913. The cubic root of 211043997 is about 595.3755574555.

The spelling of 211043997 in words is "two hundred eleven million, forty-three thousand, nine hundred ninety-seven".