211640752 has 20 divisors (see below), whose sum is σ = 434175336. Its totient is φ = 99595520.

The previous prime is 211640749. The next prime is 211640773. The reversal of 211640752 is 257046112.

It is a self number, because there is not a number n which added to its sum of digits gives 211640752.

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 3 ways as a sum of consecutive naturals, for example, 388774 + ... + 389317.

Almost surely, 2^211640752 is an apocalyptic number.

It is an amenable number.

211640752 is an abundant number, since it is smaller than the sum of its proper divisors (222534584).

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

211640752 is a wasteful number, since it uses less digits than its factorization.

211640752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778116 (or 778110 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 211640752 is about 14547.8779208515. The cubic root of 211640752 is about 595.9361972449.

Adding to 211640752 its reverse (257046112), we get a palindrome (468686864).

The spelling of 211640752 in words is "two hundred eleven million, six hundred forty thousand, seven hundred fifty-two".