2171532416 has 16 divisors (see below), whose sum is σ = 4326099990. Its totient is φ = 1085766144.

The previous prime is 2171532301. The next prime is 2171532431. The reversal of 2171532416 is 6142351712.

It can be written as a sum of positive squares in only one way, i.e., 1767361600 + 404170816 = 42040^2 + 20104^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8482421 + ... + 8482676.

Almost surely, 2^2171532416 is an apocalyptic number.

It is an amenable number.

2171532416 is a deficient number, since it is larger than the sum of its proper divisors (2154567574).

2171532416 is an equidigital number, since it uses as much as digits as its factorization.

2171532416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16965111 (or 16965099 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 2171532416 is about 46599.7040333949. The cubic root of 2171532416 is about 1294.9572723339.

The spelling of 2171532416 in words is "two billion, one hundred seventy-one million, five hundred thirty-two thousand, four hundred sixteen".