22061321553 has 16 divisors (see below), whose sum is σ = 31153230080. Its totient is φ = 13847979024.

The previous prime is 22061321543. The next prime is 22061321693. The reversal of 22061321553 is 35512316022.

It is not a de Polignac number, because 22061321553 - 2⁸ = 22061321297 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 22061321553.

It is not an unprimeable number, because it can be changed into a prime (22061321543) 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, 1177951 + ... + 1196532.

It is an arithmetic number, because the mean of its divisors is an integer number (1947076880).

Almost surely, 2^22061321553 is an apocalyptic number.

It is an amenable number.

22061321553 is a deficient number, since it is larger than the sum of its proper divisors (9091908527).

22061321553 is a wasteful number, since it uses less digits than its factorization.

22061321553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2374668.

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 22061321553 its reverse (35512316022), we get a palindrome (57573637575).

The spelling of 22061321553 in words is "twenty-two billion, sixty-one million, three hundred twenty-one thousand, five hundred fifty-three".