2171581552 has 20 divisors (see below), whose sum is σ = 4808502256. Its totient is φ = 930677760.

The previous prime is 2171581549. The next prime is 2171581579. The reversal of 2171581552 is 2551851712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9694449 + ... + 9694672.

Almost surely, 2^2171581552 is an apocalyptic number.

It is an amenable number.

2171581552 is an abundant number, since it is smaller than the sum of its proper divisors (2636920704).

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

2171581552 is a wasteful number, since it uses less digits than its factorization.

2171581552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19389136 (or 19389130 counting only the distinct ones).

The product of its digits is 28000, while the sum is 37.

The square root of 2171581552 is about 46600.2312440614. The cubic root of 2171581552 is about 1294.9670394060.

The spelling of 2171581552 in words is "two billion, one hundred seventy-one million, five hundred eighty-one thousand, five hundred fifty-two".