2131577744 has 20 divisors (see below), whose sum is σ = 4207856796. Its totient is φ = 1045679232.

The previous prime is 2131577743. The next prime is 2131577753. The reversal of 2131577744 is 4477751312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1054950400 + 1076627344 = 32480^2 + 32812^2 .

It is a super-2 number, since 2×2131577744² = 9087247357432259072, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2131577743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1255979 + ... + 1257674.

Almost surely, 2^2131577744 is an apocalyptic number.

It is an amenable number.

2131577744 is a deficient number, since it is larger than the sum of its proper divisors (2076279052).

2131577744 is a wasteful number, since it uses less digits than its factorization.

2131577744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513714 (or 2513708 counting only the distinct ones).

The product of its digits is 164640, while the sum is 41.

The square root of 2131577744 is about 46169.0128116251. The cubic root of 2131577744 is about 1286.9659569668.

The spelling of 2131577744 in words is "two billion, one hundred thirty-one million, five hundred seventy-seven thousand, seven hundred forty-four".