221338438773 has 8 divisors (see below), whose sum is σ = 296384519808. Its totient is φ = 146925658464.

The previous prime is 221338438757. The next prime is 221338438781. The reversal of 221338438773 is 377834833122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221338438773 - 2⁴ = 221338438757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221338438733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158324365 + ... + 158325762.

It is an arithmetic number, because the mean of its divisors is an integer number (37048064976).

Almost surely, 2^221338438773 is an apocalyptic number.

It is an amenable number.

221338438773 is a deficient number, since it is larger than the sum of its proper divisors (75046081035).

221338438773 is a wasteful number, since it uses less digits than its factorization.

221338438773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316650363.

The product of its digits is 4064256, while the sum is 51.

The spelling of 221338438773 in words is "two hundred twenty-one billion, three hundred thirty-eight million, four hundred thirty-eight thousand, seven hundred seventy-three".