221430313315 has 4 divisors (see below), whose sum is σ = 265716375984. Its totient is φ = 177144250648.

The previous prime is 221430313303. The next prime is 221430313369. The reversal of 221430313315 is 513313034122.

221430313315 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221430313315 - 2²⁵ = 221396758883 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22143031327 + ... + 22143031336.

It is an arithmetic number, because the mean of its divisors is an integer number (66429093996).

Almost surely, 2^221430313315 is an apocalyptic number.

221430313315 is a deficient number, since it is larger than the sum of its proper divisors (44286062669).

221430313315 is an equidigital number, since it uses as much as digits as its factorization.

221430313315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44286062668.

The product of its (nonzero) digits is 6480, while the sum is 28.

Adding to 221430313315 its reverse (513313034122), we get a palindrome (734743347437).

It can be divided in two parts, 221 and 430313315, that added together give a square (430313536 = 20744²).

The spelling of 221430313315 in words is "two hundred twenty-one billion, four hundred thirty million, three hundred thirteen thousand, three hundred fifteen".