2145131244 has 18 divisors (see below), whose sum is σ = 5422415180. Its totient is φ = 715043736.

The previous prime is 2145131237. The next prime is 2145131267. The reversal of 2145131244 is 4421315412.

2145131244 is a `hidden beast` number, since 21 + 4 + 513 + 124 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29793454 + ... + 29793525.

Almost surely, 2^2145131244 is an apocalyptic number.

It is an amenable number.

2145131244 is an abundant number, since it is smaller than the sum of its proper divisors (3277283936).

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

2145131244 is a wasteful number, since it uses less digits than its factorization.

2145131244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59586989 (or 59586984 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 2145131244 is about 46315.5615749178. The cubic root of 2145131244 is about 1289.6878927649.

Adding to 2145131244 its reverse (4421315412), we get a palindrome (6566446656).

The spelling of 2145131244 in words is "two billion, one hundred forty-five million, one hundred thirty-one thousand, two hundred forty-four".