2315503121 has 4 divisors (see below), whose sum is σ = 2341520100. Its totient is φ = 2289486144.

The previous prime is 2315503079. The next prime is 2315503163. The reversal of 2315503121 is 1213055132.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (2315503079) and next prime (2315503163).

It can be written as a sum of positive squares in 2 ways, for example, as 1630948225 + 684554896 = 40385^2 + 26164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2315503121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2315503621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13008356 + ... + 13008533.

It is an arithmetic number, because the mean of its divisors is an integer number (585380025).

Almost surely, 2^2315503121 is an apocalyptic number.

It is an amenable number.

2315503121 is a deficient number, since it is larger than the sum of its proper divisors (26016979).

2315503121 is an equidigital number, since it uses as much as digits as its factorization.

2315503121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26016978.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 2315503121 is about 48119.6749885117. The cubic root of 2315503121 is about 1322.9653111356.

Adding to 2315503121 its reverse (1213055132), we get a palindrome (3528558253).

The spelling of 2315503121 in words is "two billion, three hundred fifteen million, five hundred three thousand, one hundred twenty-one".