2521305203 has 4 divisors (see below), whose sum is σ = 2535235248. Its totient is φ = 2507375160.

The previous prime is 2521305181. The next prime is 2521305239. The reversal of 2521305203 is 3025031252.

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 2521305203 - 2¹⁶ = 2521239667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2521305503) 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, 6964751 + ... + 6965112.

It is an arithmetic number, because the mean of its divisors is an integer number (633808812).

Almost surely, 2^2521305203 is an apocalyptic number.

2521305203 is a deficient number, since it is larger than the sum of its proper divisors (13930045).

2521305203 is a wasteful number, since it uses less digits than its factorization.

2521305203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13930044.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 2521305203 is about 50212.6000422205. The cubic root of 2521305203 is about 1361.0533223616.

Adding to 2521305203 its reverse (3025031252), we get a palindrome (5546336455).

The spelling of 2521305203 in words is "two billion, five hundred twenty-one million, three hundred five thousand, two hundred three".