21443022252441 has 24 divisors (see below), whose sum is σ = 32041549679880. Its totient is φ = 13802296548096.

The previous prime is 21443022252413. The next prime is 21443022252461. The reversal of 21443022252441 is 14425222034412.

21443022252441 is a `hidden beast` number, since 2 + 1 + 44 + 30 + 2 + 22 + 524 + 41 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 556486160400 + 20886536092041 = 745980^2 + 4570179^2 .

It is not a de Polignac number, because 21443022252441 - 2⁹ = 21443022251929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21443022252396 and 21443022252405.

It is not an unprimeable number, because it can be changed into a prime (21443022252461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45156141 + ... + 45628533.

It is an arithmetic number, because the mean of its divisors is an integer number (1335064569995).

Almost surely, 2^{21443022252441} is an apocalyptic number.

It is an amenable number.

21443022252441 is a deficient number, since it is larger than the sum of its proper divisors (10598527427439).

21443022252441 is a wasteful number, since it uses less digits than its factorization.

21443022252441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646345 (or 646342 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 36.

Adding to 21443022252441 its reverse (14425222034412), we get a palindrome (35868244286853).

The spelling of 21443022252441 in words is "twenty-one trillion, four hundred forty-three billion, twenty-two million, two hundred fifty-two thousand, four hundred forty-one".