21441544230415 has 16 divisors (see below), whose sum is σ = 25776120981600. Its totient is φ = 17122392571392.

The previous prime is 21441544230401. The next prime is 21441544230473. The reversal of 21441544230415 is 51403244514412.

It is a cyclic number.

It is not a de Polignac number, because 21441544230415 - 2²⁵ = 21441510675983 is a prime.

It is a super-2 number, since 2×21441544230415² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76541476 + ... + 76821094.

It is an arithmetic number, because the mean of its divisors is an integer number (1611007561350).

Almost surely, 2^{21441544230415} is an apocalyptic number.

21441544230415 is a deficient number, since it is larger than the sum of its proper divisors (4334576751185).

21441544230415 is a wasteful number, since it uses less digits than its factorization.

21441544230415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307146.

The product of its (nonzero) digits is 307200, while the sum is 40.

Adding to 21441544230415 its reverse (51403244514412), we get a palindrome (72844788744827).

The spelling of 21441544230415 in words is "twenty-one trillion, four hundred forty-one billion, five hundred forty-four million, two hundred thirty thousand, four hundred fifteen".