2515431312523 has 4 divisors (see below), whose sum is σ = 2516337124200. Its totient is φ = 2514525500848.

The previous prime is 2515431312521. The next prime is 2515431312529. The reversal of 2515431312523 is 3252131345152.

It is a happy number.

2515431312523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2515431312523 - 2¹ = 2515431312521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2515431312521) 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, 452901673 + ... + 452907226.

It is an arithmetic number, because the mean of its divisors is an integer number (629084281050).

Almost surely, 2^{2515431312523} is an apocalyptic number.

2515431312523 is a deficient number, since it is larger than the sum of its proper divisors (905811677).

2515431312523 is an equidigital number, since it uses as much as digits as its factorization.

2515431312523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905811676.

The product of its digits is 108000, while the sum is 37.

Adding to 2515431312523 its reverse (3252131345152), we get a palindrome (5767562657675).

The spelling of 2515431312523 in words is "two trillion, five hundred fifteen billion, four hundred thirty-one million, three hundred twelve thousand, five hundred twenty-three".