2521216311603 has 48 divisors (see below), whose sum is σ = 3924703873440. Its totient is φ = 1433589160960.

The previous prime is 2521216311599. The next prime is 2521216311613. The reversal of 2521216311603 is 3061136121252.

It is not a de Polignac number, because 2521216311603 - 2² = 2521216311599 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (2521216311613) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1311793 + ... + 2600621.

It is an arithmetic number, because the mean of its divisors is an integer number (81764664030).

Almost surely, 2^{2521216311603} is an apocalyptic number.

2521216311603 is a deficient number, since it is larger than the sum of its proper divisors (1403487561837).

2521216311603 is a wasteful number, since it uses less digits than its factorization.

2521216311603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289188 (or 1289177 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The spelling of 2521216311603 in words is "two trillion, five hundred twenty-one billion, two hundred sixteen million, three hundred eleven thousand, six hundred three".