2171521132 has 24 divisors (see below), whose sum is σ = 4155560640. Its totient is φ = 984690960.

The previous prime is 2171521123. The next prime is 2171521147. The reversal of 2171521132 is 2311251712.

It is a super-2 number, since 2×2171521132² = 9431008053445122848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2171521097 and 2171521106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40458 + ... + 77329.

It is an arithmetic number, because the mean of its divisors is an integer number (173148360).

Almost surely, 2^2171521132 is an apocalyptic number.

2171521132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2171521132 is a deficient number, since it is larger than the sum of its proper divisors (1984039508).

2171521132 is a wasteful number, since it uses less digits than its factorization.

2171521132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118221 (or 118219 counting only the distinct ones).

The product of its digits is 840, while the sum is 25.

The square root of 2171521132 is about 46599.5829595073. The cubic root of 2171521132 is about 1294.9550293214.

Adding to 2171521132 its reverse (2311251712), we get a palindrome (4482772844).

The spelling of 2171521132 in words is "two billion, one hundred seventy-one million, five hundred twenty-one thousand, one hundred thirty-two".