221151204553 has 16 divisors (see below), whose sum is σ = 223996389120. Its totient is φ = 218326873216.

The previous prime is 221151204523. The next prime is 221151204581. The reversal of 221151204553 is 355402151122.

It is not a de Polignac number, because 221151204553 - 2³³ = 212561269961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221151204523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21627600 + ... + 21637822.

It is an arithmetic number, because the mean of its divisors is an integer number (13999774320).

Almost surely, 2^221151204553 is an apocalyptic number.

It is an amenable number.

221151204553 is a deficient number, since it is larger than the sum of its proper divisors (2845184567).

221151204553 is a wasteful number, since it uses less digits than its factorization.

221151204553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11216.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 221151204553 its reverse (355402151122), we get a palindrome (576553355675).

The spelling of 221151204553 in words is "two hundred twenty-one billion, one hundred fifty-one million, two hundred four thousand, five hundred fifty-three".