221442838553 has 2 divisors, whose sum is σ = 221442838554. Its totient is φ = 221442838552.

The previous prime is 221442838471. The next prime is 221442838597. The reversal of 221442838553 is 355838244122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169087907209 + 52354931344 = 411203^2 + 228812^2 .

It is a cyclic number.

It is not a de Polignac number, because 221442838553 - 2²⁸ = 221174403097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221442838498 and 221442838507.

It is not a weakly prime, because it can be changed into another prime (221442831553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110721419276 + 110721419277.

It is an arithmetic number, because the mean of its divisors is an integer number (110721419277).

Almost surely, 2^221442838553 is an apocalyptic number.

It is an amenable number.

221442838553 is a deficient number, since it is larger than the sum of its proper divisors (1).

221442838553 is an equidigital number, since it uses as much as digits as its factorization.

221442838553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1843200, while the sum is 47.

The spelling of 221442838553 in words is "two hundred twenty-one billion, four hundred forty-two million, eight hundred thirty-eight thousand, five hundred fifty-three".