221745894403 has 8 divisors (see below), whose sum is σ = 242422614720. Its totient is φ = 201155507880.

The previous prime is 221745894313. The next prime is 221745894449. The reversal of 221745894403 is 304498547122.

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

It is a cyclic number.

It is not a de Polignac number, because 221745894403 - 2²⁹ = 221209023491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221745894463) 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, 21578073 + ... + 21588346.

It is an arithmetic number, because the mean of its divisors is an integer number (30302826840).

Almost surely, 2^221745894403 is an apocalyptic number.

221745894403 is a deficient number, since it is larger than the sum of its proper divisors (20676720317).

221745894403 is a wasteful number, since it uses less digits than its factorization.

221745894403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43166897.

The product of its (nonzero) digits is 1935360, while the sum is 49.

The spelling of 221745894403 in words is "two hundred twenty-one billion, seven hundred forty-five million, eight hundred ninety-four thousand, four hundred three".