221223502441 has 4 divisors (see below), whose sum is σ = 221632418884. Its totient is φ = 220814586000.

The previous prime is 221223502399. The next prime is 221223502469. The reversal of 221223502441 is 144205322122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 164949699600 + 56273802841 = 406140^2 + 237221^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221223502441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221223502141) 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, 204457410 + ... + 204458491.

It is an arithmetic number, because the mean of its divisors is an integer number (55408104721).

Almost surely, 2^221223502441 is an apocalyptic number.

It is an amenable number.

221223502441 is a deficient number, since it is larger than the sum of its proper divisors (408916443).

221223502441 is an equidigital number, since it uses as much as digits as its factorization.

221223502441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408916442.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 221223502441 its reverse (144205322122), we get a palindrome (365428824563).

The spelling of 221223502441 in words is "two hundred twenty-one billion, two hundred twenty-three million, five hundred two thousand, four hundred forty-one".