2171510772 has 24 divisors (see below), whose sum is σ = 5077721376. Its totient is φ = 722285088.

The previous prime is 2171510771. The next prime is 2171510791. The reversal of 2171510772 is 2770151712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171510771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188143 + ... + 199350.

It is an arithmetic number, because the mean of its divisors is an integer number (211571724).

Almost surely, 2^2171510772 is an apocalyptic number.

It is an amenable number.

2171510772 is an abundant number, since it is smaller than the sum of its proper divisors (2906210604).

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

2171510772 is a wasteful number, since it uses less digits than its factorization.

2171510772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387967 (or 387965 counting only the distinct ones).

The product of its (nonzero) digits is 6860, while the sum is 33.

The square root of 2171510772 is about 46599.4717995816. The cubic root of 2171510772 is about 1294.9529699731.

The spelling of 2171510772 in words is "two billion, one hundred seventy-one million, five hundred ten thousand, seven hundred seventy-two".