2521512013 has 4 divisors (see below), whose sum is σ = 2583012348. Its totient is φ = 2460011680.

The previous prime is 2521511947. The next prime is 2521512023. The reversal of 2521512013 is 3102151252.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1456338244 + 1065173769 = 38162^2 + 32637^2 .

It is a cyclic number.

It is not a de Polignac number, because 2521512013 - 2²¹ = 2519414861 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 (2521512023) 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, 30750106 + ... + 30750187.

It is an arithmetic number, because the mean of its divisors is an integer number (645753087).

Almost surely, 2^2521512013 is an apocalyptic number.

It is an amenable number.

2521512013 is a deficient number, since it is larger than the sum of its proper divisors (61500335).

2521512013 is an equidigital number, since it uses as much as digits as its factorization.

2521512013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61500334.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 2521512013 is about 50214.6593436618. The cubic root of 2521512013 is about 1361.0905347998.

Adding to 2521512013 its reverse (3102151252), we get a palindrome (5623663265).

The spelling of 2521512013 in words is "two billion, five hundred twenty-one million, five hundred twelve thousand, thirteen".