221430313405 has 32 divisors (see below), whose sum is σ = 311967694080. Its totient is φ = 147694233600.

The previous prime is 221430313393. The next prime is 221430313501. The reversal of 221430313405 is 504313034122.

It is a happy number.

It is not a de Polignac number, because 221430313405 - 2²¹ = 221428216253 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5224941 + ... + 5267149.

It is an arithmetic number, because the mean of its divisors is an integer number (9748990440).

Almost surely, 2^221430313405 is an apocalyptic number.

It is an amenable number.

221430313405 is a deficient number, since it is larger than the sum of its proper divisors (90537380675).

221430313405 is a wasteful number, since it uses less digits than its factorization.

221430313405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46309.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 221430313405 its reverse (504313034122), we get a palindrome (725743347527).

It can be divided in two parts, 22143031 and 3405, that added together give a square (22146436 = 4706²).

The spelling of 221430313405 in words is "two hundred twenty-one billion, four hundred thirty million, three hundred thirteen thousand, four hundred five".