2521263503 has 4 divisors (see below), whose sum is σ = 2750469288. Its totient is φ = 2292057720.

The previous prime is 2521263499. The next prime is 2521263517. The reversal of 2521263503 is 3053621252.

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 2521263503 - 2² = 2521263499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521263203) 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, 114602876 + ... + 114602897.

It is an arithmetic number, because the mean of its divisors is an integer number (687617322).

Almost surely, 2^2521263503 is an apocalyptic number.

2521263503 is a deficient number, since it is larger than the sum of its proper divisors (229205785).

2521263503 is a wasteful number, since it uses less digits than its factorization.

2521263503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229205784.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 2521263503 is about 50212.1848060807. The cubic root of 2521263503 is about 1361.0458188093.

Adding to 2521263503 its reverse (3053621252), we get a palindrome (5574884755).

The spelling of 2521263503 in words is "two billion, five hundred twenty-one million, two hundred sixty-three thousand, five hundred three".