21563060315519 has 2 divisors, whose sum is σ = 21563060315520. Its totient is φ = 21563060315518.

The previous prime is 21563060315483. The next prime is 21563060315551. The reversal of 21563060315519 is 91551306036512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21563060315519 - 2¹² = 21563060311423 is a prime.

It is a super-2 number, since 2×21563060315519² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21563060315569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10781530157759 + 10781530157760.

It is an arithmetic number, because the mean of its divisors is an integer number (10781530157760).

Almost surely, 2^{21563060315519} is an apocalyptic number.

21563060315519 is a deficient number, since it is larger than the sum of its proper divisors (1).

21563060315519 is an equidigital number, since it uses as much as digits as its factorization.

21563060315519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 729000, while the sum is 47.

The spelling of 21563060315519 in words is "twenty-one trillion, five hundred sixty-three billion, sixty million, three hundred fifteen thousand, five hundred nineteen".