221449481233 has 6 divisors (see below), whose sum is σ = 221944135814. Its totient is φ = 220954871136.

The previous prime is 221449481177. The next prime is 221449481251. The reversal of 221449481233 is 332184944122.

It can be written as a sum of positive squares in 3 ways, for example, as 112739478289 + 108710002944 = 335767^2 + 329712^2 .

It is a de Polignac number, because none of the positive numbers 2^k-221449481233 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221449481233.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221449481833) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10048935 + ... + 10070947.

Almost surely, 2^221449481233 is an apocalyptic number.

It is an amenable number.

221449481233 is a deficient number, since it is larger than the sum of its proper divisors (494654581).

221449481233 is an frugal number, since it uses more digits than its factorization.

221449481233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44483 (or 22470 counting only the distinct ones).

The product of its digits is 331776, while the sum is 43.

The spelling of 221449481233 in words is "two hundred twenty-one billion, four hundred forty-nine million, four hundred eighty-one thousand, two hundred thirty-three".