421541223215 has 16 divisors (see below), whose sum is σ = 579129721920. Its totient is φ = 288548816640.

The previous prime is 421541223193. The next prime is 421541223227. The reversal of 421541223215 is 512322145124.

It is not a de Polignac number, because 421541223215 - 2¹² = 421541219119 is a prime.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 10563596 + ... + 10603425.

It is an arithmetic number, because the mean of its divisors is an integer number (36195607620).

Almost surely, 2^421541223215 is an apocalyptic number.

421541223215 is a deficient number, since it is larger than the sum of its proper divisors (157588498705).

421541223215 is a wasteful number, since it uses less digits than its factorization.

421541223215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21167602.

The product of its digits is 19200, while the sum is 32.

Adding to 421541223215 its reverse (512322145124), we get a palindrome (933863368339).

The spelling of 421541223215 in words is "four hundred twenty-one billion, five hundred forty-one million, two hundred twenty-three thousand, two hundred fifteen".