221423637413 has 16 divisors (see below), whose sum is σ = 245907256320. Its totient is φ = 197672943600.

The previous prime is 221423637377. The next prime is 221423637509. The reversal of 221423637413 is 314736324122.

221423637413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221423637413 - 2¹⁸ = 221423375269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221423637313) by changing a digit.

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, 434468 + ... + 794738.

It is an arithmetic number, because the mean of its divisors is an integer number (15369203520).

Almost surely, 2^221423637413 is an apocalyptic number.

It is an amenable number.

221423637413 is a deficient number, since it is larger than the sum of its proper divisors (24483618907).

221423637413 is a wasteful number, since it uses less digits than its factorization.

221423637413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361288.

The product of its digits is 145152, while the sum is 38.

The spelling of 221423637413 in words is "two hundred twenty-one billion, four hundred twenty-three million, six hundred thirty-seven thousand, four hundred thirteen".