2171520210 has 64 divisors (see below), whose sum is σ = 5348331648. Its totient is φ = 563963904.

The previous prime is 2171520181. The next prime is 2171520233. The reversal of 2171520210 is 120251712.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 478914 + ... + 483426.

It is an arithmetic number, because the mean of its divisors is an integer number (83567682).

Almost surely, 2^2171520210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2171520210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2674165824).

2171520210 is an abundant number, since it is smaller than the sum of its proper divisors (3176811438).

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

2171520210 is a wasteful number, since it uses less digits than its factorization.

2171520210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4939.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 2171520210 is about 46599.5730667138. The cubic root of 2171520210 is about 1294.9548460476.

Adding to 2171520210 its reverse (120251712), we get a palindrome (2291771922).

The spelling of 2171520210 in words is "two billion, one hundred seventy-one million, five hundred twenty thousand, two hundred ten".