21655112183 has 2 divisors, whose sum is σ = 21655112184. Its totient is φ = 21655112182.

The previous prime is 21655112153. The next prime is 21655112197. The reversal of 21655112183 is 38121155612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21655112183 - 2¹⁴ = 21655095799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21655112123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10827556091 + 10827556092.

It is an arithmetic number, because the mean of its divisors is an integer number (10827556092).

Almost surely, 2^21655112183 is an apocalyptic number.

21655112183 is a deficient number, since it is larger than the sum of its proper divisors (1).

21655112183 is an equidigital number, since it uses as much as digits as its factorization.

21655112183 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 35.

Adding to 21655112183 its reverse (38121155612), we get a palindrome (59776267795).

The spelling of 21655112183 in words is "twenty-one billion, six hundred fifty-five million, one hundred twelve thousand, one hundred eighty-three".