2143515131 has 2 divisors, whose sum is σ = 2143515132. Its totient is φ = 2143515130.

The previous prime is 2143515109. The next prime is 2143515161. The reversal of 2143515131 is 1315153412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2143515131 - 2⁶ = 2143515067 is a prime.

It is a super-2 number, since 2×2143515131² = 9189314233651894322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2143515131.

It is not a weakly prime, because it can be changed into another prime (2143515161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071757565 + 1071757566.

It is an arithmetic number, because the mean of its divisors is an integer number (1071757566).

Almost surely, 2^2143515131 is an apocalyptic number.

2143515131 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143515131 is an equidigital number, since it uses as much as digits as its factorization.

2143515131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 26.

The square root of 2143515131 is about 46298.1115273615. Note that the first 3 decimals coincide. The cubic root of 2143515131 is about 1289.3639335638.

Adding to 2143515131 its reverse (1315153412), we get a palindrome (3458668543).

The spelling of 2143515131 in words is "two billion, one hundred forty-three million, five hundred fifteen thousand, one hundred thirty-one".