2131211444 has 24 divisors (see below), whose sum is σ = 3810469320. Its totient is φ = 1042753536.

The previous prime is 2131211417. The next prime is 2131211483. The reversal of 2131211444 is 4441121312.

It can be written as a sum of positive squares in 4 ways, for example, as 2496400 + 2128715044 = 1580^2 + 46138^2 .

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, 3674 + ... + 65390.

It is an arithmetic number, because the mean of its divisors is an integer number (158769555).

Almost surely, 2^2131211444 is an apocalyptic number.

It is an amenable number.

2131211444 is a deficient number, since it is larger than the sum of its proper divisors (1679257876).

2131211444 is a wasteful number, since it uses less digits than its factorization.

2131211444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61907 (or 61905 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

The square root of 2131211444 is about 46165.0456947678. The cubic root of 2131211444 is about 1286.8922333854.

Adding to 2131211444 its reverse (4441121312), we get a palindrome (6572332756).

The spelling of 2131211444 in words is "two billion, one hundred thirty-one million, two hundred eleven thousand, four hundred forty-four".