210252721164 has 48 divisors (see below), whose sum is σ = 509213193216. Its totient is φ = 67448721600.

The previous prime is 210252721153. The next prime is 210252721169. The reversal of 210252721164 is 461127252012.

It is not an unprimeable number, because it can be changed into a prime (210252721169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1493982 + ... + 1628645.

It is an arithmetic number, because the mean of its divisors is an integer number (10608608192).

Almost surely, 2^210252721164 is an apocalyptic number.

It is an amenable number.

210252721164 is an abundant number, since it is smaller than the sum of its proper divisors (298960472052).

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

210252721164 is a wasteful number, since it uses less digits than its factorization.

210252721164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3122846 (or 3122844 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

Adding to 210252721164 its reverse (461127252012), we get a palindrome (671379973176).

The spelling of 210252721164 in words is "two hundred ten billion, two hundred fifty-two million, seven hundred twenty-one thousand, one hundred sixty-four".