2521037539 has 4 divisors (see below), whose sum is σ = 2521137960. Its totient is φ = 2520937120.

The previous prime is 2521037531. The next prime is 2521037543. The reversal of 2521037539 is 9357301252.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2521037539 - 2³ = 2521037531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2521037498 and 2521037507.

It is not an unprimeable number, because it can be changed into a prime (2521037531) 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, 24984 + ... + 75274.

It is an arithmetic number, because the mean of its divisors is an integer number (630284490).

Almost surely, 2^2521037539 is an apocalyptic number.

2521037539 is a deficient number, since it is larger than the sum of its proper divisors (100421).

2521037539 is an equidigital number, since it uses as much as digits as its factorization.

2521037539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100420.

The product of its (nonzero) digits is 56700, while the sum is 37.

The square root of 2521037539 is about 50209.9346643670. The cubic root of 2521037539 is about 1361.0051571140.

The spelling of 2521037539 in words is "two billion, five hundred twenty-one million, thirty-seven thousand, five hundred thirty-nine".