2315143121 has 2 divisors, whose sum is σ = 2315143122. Its totient is φ = 2315143120.

The previous prime is 2315143099. The next prime is 2315143133. The reversal of 2315143121 is 1213415132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2128438225 + 186704896 = 46135^2 + 13664^2 .

It is a cyclic number.

It is not a de Polignac number, because 2315143121 - 2³⁰ = 1241401297 is a prime.

It is not a weakly prime, because it can be changed into another prime (2315943121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1157571560 + 1157571561.

It is an arithmetic number, because the mean of its divisors is an integer number (1157571561).

Almost surely, 2^2315143121 is an apocalyptic number.

It is an amenable number.

2315143121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2315143121 is an equidigital number, since it uses as much as digits as its factorization.

2315143121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 23.

The square root of 2315143121 is about 48115.9341694620. The cubic root of 2315143121 is about 1322.8967454472.

Adding to 2315143121 its reverse (1213415132), we get a palindrome (3528558253).

The spelling of 2315143121 in words is "two billion, three hundred fifteen million, one hundred forty-three thousand, one hundred twenty-one".