16221112533 has 24 divisors (see below), whose sum is σ = 23797551960. Its totient is φ = 10645240320.

The previous prime is 16221112471. The next prime is 16221112541. The reversal of 16221112533 is 33521112261.

16221112533 is a `hidden beast` number, since 1 + 622 + 1 + 1 + 1 + 2 + 5 + 33 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 33489 + 16221079044 = 183^2 + 127362^2 .

It is not a de Polignac number, because 16221112533 - 2⁸ = 16221112277 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16221112497 and 16221112506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16221112543) 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, 318603 + ... + 365991.

It is an arithmetic number, because the mean of its divisors is an integer number (991564665).

Almost surely, 2^16221112533 is an apocalyptic number.

It is an amenable number.

16221112533 is a deficient number, since it is larger than the sum of its proper divisors (7576439427).

16221112533 is a wasteful number, since it uses less digits than its factorization.

16221112533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47989 (or 47986 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

Adding to 16221112533 its reverse (33521112261), we get a palindrome (49742224794).

The spelling of 16221112533 in words is "sixteen billion, two hundred twenty-one million, one hundred twelve thousand, five hundred thirty-three".