21443055530527 has 2 divisors, whose sum is σ = 21443055530528. Its totient is φ = 21443055530526.

The previous prime is 21443055530483. The next prime is 21443055530657. The reversal of 21443055530527 is 72503555034412.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21443055530527 is a prime.

It is a super-2 number, since 2×21443055530527² (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 (21443055630527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10721527765263 + 10721527765264.

It is an arithmetic number, because the mean of its divisors is an integer number (10721527765264).

Almost surely, 2^{21443055530527} is an apocalyptic number.

21443055530527 is a deficient number, since it is larger than the sum of its proper divisors (1).

21443055530527 is an equidigital number, since it uses as much as digits as its factorization.

21443055530527 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520000, while the sum is 46.

The spelling of 21443055530527 in words is "twenty-one trillion, four hundred forty-three billion, fifty-five million, five hundred thirty thousand, five hundred twenty-seven".