14553212221 has 4 divisors (see below), whose sum is σ = 14554397052. Its totient is φ = 14552027392.

The previous prime is 14553212153. The next prime is 14553212237. The reversal of 14553212221 is 12221235541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12221235541 = 23 ⋅531358067.

It can be written as a sum of positive squares in 2 ways, for example, as 9807931225 + 4745280996 = 99035^2 + 68886^2 .

It is a cyclic number.

It is not a de Polignac number, because 14553212221 - 2¹¹ = 14553210173 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 14553212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14553212021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 573796 + ... + 598621.

It is an arithmetic number, because the mean of its divisors is an integer number (3638599263).

Almost surely, 2^14553212221 is an apocalyptic number.

It is an amenable number.

14553212221 is a deficient number, since it is larger than the sum of its proper divisors (1184831).

14553212221 is a wasteful number, since it uses less digits than its factorization.

14553212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184830.

The product of its digits is 4800, while the sum is 28.

Adding to 14553212221 its reverse (12221235541), we get a palindrome (26774447762).

The spelling of 14553212221 in words is "fourteen billion, five hundred fifty-three million, two hundred twelve thousand, two hundred twenty-one".