210221773272 has 96 divisors (see below), whose sum is σ = 657394701600. Its totient is φ = 59444140032.

The previous prime is 210221773261. The next prime is 210221773273. The reversal of 210221773272 is 272377122012.

210221773272 is a `hidden beast` number, since 2 + 102 + 217 + 73 + 272 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210221773273) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2101147 + ... + 2198922.

It is an arithmetic number, because the mean of its divisors is an integer number (6847861475).

Almost surely, 2^210221773272 is an apocalyptic number.

It is an amenable number.

210221773272 is an abundant number, since it is smaller than the sum of its proper divisors (447172928328).

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

210221773272 is a wasteful number, since it uses less digits than its factorization.

210221773272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4300185 (or 4300178 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

Adding to 210221773272 its reverse (272377122012), we get a palindrome (482598895284).

The spelling of 210221773272 in words is "two hundred ten billion, two hundred twenty-one million, seven hundred seventy-three thousand, two hundred seventy-two".