21226053533 has 8 divisors (see below), whose sum is σ = 21395585376. Its totient is φ = 21056635600.

The previous prime is 21226053529. The next prime is 21226053553. The reversal of 21226053533 is 33535062212.

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 21226053533 - 2² = 21226053529 is a prime.

It is a super-4 number, since 4×21226053533⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21226053533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21226053553) 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, 367535 + ... + 421347.

It is an arithmetic number, because the mean of its divisors is an integer number (2674448172).

Almost surely, 2^21226053533 is an apocalyptic number.

It is an amenable number.

21226053533 is a deficient number, since it is larger than the sum of its proper divisors (169531843).

21226053533 is a wasteful number, since it uses less digits than its factorization.

21226053533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56955.

The product of its (nonzero) digits is 32400, while the sum is 32.

The spelling of 21226053533 in words is "twenty-one billion, two hundred twenty-six million, fifty-three thousand, five hundred thirty-three".