2171211264 has 80 divisors (see below), whose sum is σ = 6426977040. Its totient is φ = 723732480.

The previous prime is 2171211257. The next prime is 2171211281. The reversal of 2171211264 is 4621121712.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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, 64707 + ... + 92354.

It is an arithmetic number, because the mean of its divisors is an integer number (80337213).

Almost surely, 2^2171211264 is an apocalyptic number.

2171211264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2171211264 is an abundant number, since it is smaller than the sum of its proper divisors (4255765776).

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

2171211264 is an equidigital number, since it uses as much as digits as its factorization.

2171211264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157088 (or 157066 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 2171211264 is about 46596.2580471866. The cubic root of 2171211264 is about 1294.8934313004.

Adding to 2171211264 its reverse (4621121712), we get a palindrome (6792332976).

The spelling of 2171211264 in words is "two billion, one hundred seventy-one million, two hundred eleven thousand, two hundred sixty-four".