2321506129 has 4 divisors (see below), whose sum is σ = 2321874100. Its totient is φ = 2321138160.

The previous prime is 2321506093. The next prime is 2321506177. The reversal of 2321506129 is 9216051232.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 842334529 + 1479171600 = 29023^2 + 38460^2 .

It is a cyclic number.

It is not a de Polignac number, because 2321506129 - 2¹⁵ = 2321473361 is a prime.

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 2321506129.

It is not an unprimeable number, because it can be changed into a prime (2321506729) 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, 174354 + ... + 187195.

It is an arithmetic number, because the mean of its divisors is an integer number (580468525).

Almost surely, 2^2321506129 is an apocalyptic number.

It is an amenable number.

2321506129 is a deficient number, since it is larger than the sum of its proper divisors (367971).

2321506129 is an equidigital number, since it uses as much as digits as its factorization.

2321506129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367970.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 2321506129 is about 48182.0104292048. The cubic root of 2321506129 is about 1324.1075996880.

The spelling of 2321506129 in words is "two billion, three hundred twenty-one million, five hundred six thousand, one hundred twenty-nine".