2321515129 has 2 divisors, whose sum is σ = 2321515130. Its totient is φ = 2321515128.

The previous prime is 2321515127. The next prime is 2321515139. The reversal of 2321515129 is 9215151232.

2321515129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2146005625 + 175509504 = 46325^2 + 13248^2 .

It is a cyclic number.

It is not a de Polignac number, because 2321515129 - 2¹ = 2321515127 is a prime.

Together with 2321515127, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2321515129.

It is not a weakly prime, because it can be changed into another prime (2321515123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1160757564 + 1160757565.

It is an arithmetic number, because the mean of its divisors is an integer number (1160757565).

Almost surely, 2^2321515129 is an apocalyptic number.

It is an amenable number.

2321515129 is a deficient number, since it is larger than the sum of its proper divisors (1).

2321515129 is an equidigital number, since it uses as much as digits as its factorization.

2321515129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 31.

The square root of 2321515129 is about 48182.1038249680. The cubic root of 2321515129 is about 1324.1093107831.

It can be divided in two parts, 232 and 1515129, that added together give a square (1515361 = 1231²).

The spelling of 2321515129 in words is "two billion, three hundred twenty-one million, five hundred fifteen thousand, one hundred twenty-nine".