2515243123 has 4 divisors (see below), whose sum is σ = 2647624360. Its totient is φ = 2382861888.

The previous prime is 2515243111. The next prime is 2515243153. The reversal of 2515243123 is 3213425152.

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

It is a cyclic number.

It is not a de Polignac number, because 2515243123 - 2¹⁷ = 2515112051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2515243091 and 2515243100.

It is not an unprimeable number, because it can be changed into a prime (2515243153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66190590 + ... + 66190627.

It is an arithmetic number, because the mean of its divisors is an integer number (661906090).

Almost surely, 2^2515243123 is an apocalyptic number.

2515243123 is a deficient number, since it is larger than the sum of its proper divisors (132381237).

2515243123 is a wasteful number, since it uses less digits than its factorization.

2515243123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132381236.

The product of its digits is 7200, while the sum is 28.

The square root of 2515243123 is about 50152.1995828697. The cubic root of 2515243123 is about 1359.9616344065.

Adding to 2515243123 its reverse (3213425152), we get a palindrome (5728668275).

The spelling of 2515243123 in words is "two billion, five hundred fifteen million, two hundred forty-three thousand, one hundred twenty-three".