22221661553 has 12 divisors (see below), whose sum is σ = 27838126260. Its totient is φ = 17581973472.

The previous prime is 22221661543. The next prime is 22221661589. The reversal of 22221661553 is 35516612222.

It can be written as a sum of positive squares in 2 ways, for example, as 6712197184 + 15509464369 = 81928^2 + 124537^2 .

It is a de Polignac number, because none of the positive numbers 2^k-22221661553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22221661543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17441798 + ... + 17443071.

It is an arithmetic number, because the mean of its divisors is an integer number (2319843855).

Almost surely, 2^22221661553 is an apocalyptic number.

It is an amenable number.

22221661553 is a deficient number, since it is larger than the sum of its proper divisors (5616464707).

22221661553 is a wasteful number, since it uses less digits than its factorization.

22221661553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34884896 (or 34884889 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The spelling of 22221661553 in words is "twenty-two billion, two hundred twenty-one million, six hundred sixty-one thousand, five hundred fifty-three".