22261321553 has 4 divisors (see below), whose sum is σ = 22267611828. Its totient is φ = 22255031280.

The previous prime is 22261321477. The next prime is 22261321567. The reversal of 22261321553 is 35512316222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35512316222 = 2 ⋅17756158111.

It can be written as a sum of positive squares in 2 ways, for example, as 6235787089 + 16025534464 = 78967^2 + 126592^2 .

It is a cyclic number.

It is not a de Polignac number, because 22261321553 - 2⁸ = 22261321297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22261321573) 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, 3139826 + ... + 3146907.

It is an arithmetic number, because the mean of its divisors is an integer number (5566902957).

Almost surely, 2^22261321553 is an apocalyptic number.

It is an amenable number.

22261321553 is a deficient number, since it is larger than the sum of its proper divisors (6290275).

22261321553 is an equidigital number, since it uses as much as digits as its factorization.

22261321553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6290274.

The product of its digits is 21600, while the sum is 32.

Adding to 22261321553 its reverse (35512316222), we get a palindrome (57773637775).

The spelling of 22261321553 in words is "twenty-two billion, two hundred sixty-one million, three hundred twenty-one thousand, five hundred fifty-three".