221444430413 has 16 divisors (see below), whose sum is σ = 230952675840. Its totient is φ = 212085864000.

The previous prime is 221444430397. The next prime is 221444430421. The reversal of 221444430413 is 314034444122.

It is a cyclic number.

It is not a de Polignac number, because 221444430413 - 2⁴ = 221444430397 is a prime.

It is a super-3 number, since 3×221444430413³ (a number of 35 digits) contains 333 as substring.

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 221444430413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221444430463) 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, 7709843 + ... + 7738511.

It is an arithmetic number, because the mean of its divisors is an integer number (14434542240).

Almost surely, 2^221444430413 is an apocalyptic number.

It is an amenable number.

221444430413 is a deficient number, since it is larger than the sum of its proper divisors (9508245427).

221444430413 is a wasteful number, since it uses less digits than its factorization.

221444430413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31268.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 221444430413 its reverse (314034444122), we get a palindrome (535478874535).

The spelling of 221444430413 in words is "two hundred twenty-one billion, four hundred forty-four million, four hundred thirty thousand, four hundred thirteen".