211330764 has 18 divisors (see below), whose sum is σ = 534197300. Its totient is φ = 70443576.

The previous prime is 211330759. The next prime is 211330771. The reversal of 211330764 is 467033112.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 2935114 + ... + 2935185.

Almost surely, 2^211330764 is an apocalyptic number.

It is an amenable number.

211330764 is an abundant number, since it is smaller than the sum of its proper divisors (322866536).

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

211330764 is a wasteful number, since it uses less digits than its factorization.

211330764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5870309 (or 5870304 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 211330764 is about 14537.2199543104. The cubic root of 211330764 is about 595.6451012346.

Adding to 211330764 its reverse (467033112), we get a palindrome (678363876).

The spelling of 211330764 in words is "two hundred eleven million, three hundred thirty thousand, seven hundred sixty-four".