5221021621563 has 64 divisors (see below), whose sum is σ = 8620959744000. Its totient is φ = 3096333838080.

The previous prime is 5221021621561. The next prime is 5221021621573. The reversal of 5221021621563 is 3651261201225.

5221021621563 is a `hidden beast` number, since 5 + 2 + 2 + 1 + 0 + 21 + 621 + 5 + 6 + 3 = 666.

It is not a de Polignac number, because 5221021621563 - 2¹ = 5221021621561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5221021621561) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1805413 + ... + 3701561.

It is an arithmetic number, because the mean of its divisors is an integer number (134702496000).

Almost surely, 2^{5221021621563} is an apocalyptic number.

5221021621563 is a deficient number, since it is larger than the sum of its proper divisors (3399938122437).

5221021621563 is a wasteful number, since it uses less digits than its factorization.

5221021621563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896369 (or 1896363 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

Adding to 5221021621563 its reverse (3651261201225), we get a palindrome (8872282822788).

The spelling of 5221021621563 in words is "five trillion, two hundred twenty-one billion, twenty-one million, six hundred twenty-one thousand, five hundred sixty-three".