221255433313 has 16 divisors (see below), whose sum is σ = 235537666560. Its totient is φ = 207115727616.

The previous prime is 221255433253. The next prime is 221255433323. The reversal of 221255433313 is 313334552122.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221255433313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221255433323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4177906 + ... + 4230532.

It is an arithmetic number, because the mean of its divisors is an integer number (14721104160).

Almost surely, 2^221255433313 is an apocalyptic number.

It is an amenable number.

221255433313 is a deficient number, since it is larger than the sum of its proper divisors (14282233247).

221255433313 is a wasteful number, since it uses less digits than its factorization.

221255433313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53976.

The product of its digits is 64800, while the sum is 34.

Adding to 221255433313 its reverse (313334552122), we get a palindrome (534589985435).

The spelling of 221255433313 in words is "two hundred twenty-one billion, two hundred fifty-five million, four hundred thirty-three thousand, three hundred thirteen".