221431421674623 has 4 divisors (see below), whose sum is σ = 295241895566168. Its totient is φ = 147620947783080.

The previous prime is 221431421674609. The next prime is 221431421674691. The reversal of 221431421674623 is 326476124134122.

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

It is not a de Polignac number, because 221431421674623 - 2⁴ = 221431421674607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221431421674123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36905236945768 + ... + 36905236945773.

It is an arithmetic number, because the mean of its divisors is an integer number (73810473891542).

Almost surely, 2^{221431421674623} is an apocalyptic number.

221431421674623 is a deficient number, since it is larger than the sum of its proper divisors (73810473891545).

221431421674623 is an equidigital number, since it uses as much as digits as its factorization.

221431421674623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73810473891544.

The product of its digits is 2322432, while the sum is 48.

The spelling of 221431421674623 in words is "two hundred twenty-one trillion, four hundred thirty-one billion, four hundred twenty-one million, six hundred seventy-four thousand, six hundred twenty-three".