2521216563 has 8 divisors (see below), whose sum is σ = 3391371408. Its totient is φ = 1665936384.

The previous prime is 2521216561. The next prime is 2521216583. The reversal of 2521216563 is 3656121252.

2521216563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2521216563 - 2¹ = 2521216561 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (2521216561) 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, 3718270 + ... + 3718947.

It is an arithmetic number, because the mean of its divisors is an integer number (423921426).

Almost surely, 2^2521216563 is an apocalyptic number.

2521216563 is a deficient number, since it is larger than the sum of its proper divisors (870154845).

2521216563 is a wasteful number, since it uses less digits than its factorization.

2521216563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7437333.

The product of its digits is 21600, while the sum is 33.

The square root of 2521216563 is about 50211.7173874784. The cubic root of 2521216563 is about 1361.0373722656.

The spelling of 2521216563 in words is "two billion, five hundred twenty-one million, two hundred sixteen thousand, five hundred sixty-three".