221315344441 has 8 divisors (see below), whose sum is σ = 234376777800. Its totient is φ = 208258675968.

The previous prime is 221315344403. The next prime is 221315344451. The reversal of 221315344441 is 144443513122.

It can be written as a sum of positive squares in 4 ways, for example, as 163248321600 + 58067022841 = 404040^2 + 240971^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221315344441 - 2¹⁵ = 221315311673 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221315344397 and 221315344406.

It is not an unprimeable number, because it can be changed into a prime (221315344451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1095366 + ... + 1281583.

It is an arithmetic number, because the mean of its divisors is an integer number (29297097225).

Almost surely, 2^221315344441 is an apocalyptic number.

It is an amenable number.

221315344441 is a deficient number, since it is larger than the sum of its proper divisors (13061433359).

221315344441 is a wasteful number, since it uses less digits than its factorization.

221315344441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2382443.

The product of its digits is 46080, while the sum is 34.

Adding to 221315344441 its reverse (144443513122), we get a palindrome (365758857563).

The spelling of 221315344441 in words is "two hundred twenty-one billion, three hundred fifteen million, three hundred forty-four thousand, four hundred forty-one".