221726303401 has 16 divisors (see below), whose sum is σ = 227724436800. Its totient is φ = 215805227008.

The previous prime is 221726303399. The next prime is 221726303437. The reversal of 221726303401 is 104303627122.

It is a happy number.

It is not a de Polignac number, because 221726303401 - 2¹ = 221726303399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221726303101) 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 15 ways as a sum of consecutive naturals, for example, 11915961 + ... + 11934553.

It is an arithmetic number, because the mean of its divisors is an integer number (14232777300).

Almost surely, 2^221726303401 is an apocalyptic number.

It is an amenable number.

221726303401 is a deficient number, since it is larger than the sum of its proper divisors (5998133399).

221726303401 is a wasteful number, since it uses less digits than its factorization.

221726303401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20648.

The product of its (nonzero) digits is 12096, while the sum is 31.

The spelling of 221726303401 in words is "two hundred twenty-one billion, seven hundred twenty-six million, three hundred three thousand, four hundred one".