2521316635 has 8 divisors (see below), whose sum is σ = 3056772096. Its totient is φ = 1996258560.

The previous prime is 2521316621. The next prime is 2521316639. The reversal of 2521316635 is 5366131252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2521316635 - 2⁷ = 2521316507 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2521316635.

It is not an unprimeable number, because it can be changed into a prime (2521316639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2598811 + ... + 2599780.

It is an arithmetic number, because the mean of its divisors is an integer number (382096512).

Almost surely, 2^2521316635 is an apocalyptic number.

2521316635 is a deficient number, since it is larger than the sum of its proper divisors (535455461).

2521316635 is an equidigital number, since it uses as much as digits as its factorization.

2521316635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5198693.

The product of its digits is 32400, while the sum is 34.

The square root of 2521316635 is about 50212.7138780608. The cubic root of 2521316635 is about 1361.0553794362.

Adding to 2521316635 its reverse (5366131252), we get a palindrome (7887447887).

The spelling of 2521316635 in words is "two billion, five hundred twenty-one million, three hundred sixteen thousand, six hundred thirty-five".