2131340045 has 16 divisors (see below), whose sum is σ = 2640111408. Its totient is φ = 1650539520.

The previous prime is 2131340041. The next prime is 2131340051. The reversal of 2131340045 is 5400431312.

It can be written as a sum of positive squares in 8 ways, for example, as 1070991076 + 1060348969 = 32726^2 + 32563^2 .

It is not a de Polignac number, because 2131340045 - 2² = 2131340041 is a prime.

It is a super-2 number, since 2×2131340045² = 9085220774841204050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2131340045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131340041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7205 + ... + 65685.

It is an arithmetic number, because the mean of its divisors is an integer number (165006963).

Almost surely, 2^2131340045 is an apocalyptic number.

It is an amenable number.

2131340045 is a deficient number, since it is larger than the sum of its proper divisors (508771363).

2131340045 is a wasteful number, since it uses less digits than its factorization.

2131340045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58720.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 2131340045 is about 46166.4385132750. The cubic root of 2131340045 is about 1286.9181173022.

Adding to 2131340045 its reverse (5400431312), we get a palindrome (7531771357).

The spelling of 2131340045 in words is "two billion, one hundred thirty-one million, three hundred forty thousand, forty-five".