210871987264 has 63 divisors (see below), whose sum is σ = 425873952543. Its totient is φ = 103597324800.

The previous prime is 210871987181. The next prime is 210871987267. The reversal of 210871987264 is 462789178012.

The square root of 210871987264 is 459208.

It is a perfect power (a square), and thus also a powerful number.

210871987264 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 45450828864 + 165421158400 = 213192^2 + 406720^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210871987267) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 224093034 + ... + 224093974.

Almost surely, 2^210871987264 is an apocalyptic number.

210871987264 is the 459208-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210871987264

210871987264 is an abundant number, since it is smaller than the sum of its proper divisors (215001965279).

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

210871987264 is an frugal number, since it uses more digits than its factorization.

210871987264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2016 (or 1004 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 55.

The spelling of 210871987264 in words is "two hundred ten billion, eight hundred seventy-one million, nine hundred eighty-seven thousand, two hundred sixty-four".