21415145441 has 8 divisors (see below), whose sum is σ = 21531139200. Its totient is φ = 21299372080.

The previous prime is 21415145413. The next prime is 21415145447. The reversal of 21415145441 is 14454151412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21415145441 - 2¹⁰ = 21415144417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21415145398 and 21415145407.

It is not an unprimeable number, because it can be changed into a prime (21415145447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141650 + ... + 250788.

It is an arithmetic number, because the mean of its divisors is an integer number (2691392400).

Almost surely, 2^21415145441 is an apocalyptic number.

It is an amenable number.

21415145441 is a deficient number, since it is larger than the sum of its proper divisors (115993759).

21415145441 is a wasteful number, since it uses less digits than its factorization.

21415145441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110199.

The product of its digits is 12800, while the sum is 32.

Adding to 21415145441 its reverse (14454151412), we get a palindrome (35869296853).

The spelling of 21415145441 in words is "twenty-one billion, four hundred fifteen million, one hundred forty-five thousand, four hundred forty-one".