221302728382 has 4 divisors (see below), whose sum is σ = 331954092576. Its totient is φ = 110651364190.

The previous prime is 221302728341. The next prime is 221302728389. The reversal of 221302728382 is 283827203122.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221302728389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55325682094 + ... + 55325682097.

It is an arithmetic number, because the mean of its divisors is an integer number (82988523144).

Almost surely, 2^221302728382 is an apocalyptic number.

221302728382 is a deficient number, since it is larger than the sum of its proper divisors (110651364194).

221302728382 is a wasteful number, since it uses less digits than its factorization.

221302728382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110651364193.

The product of its (nonzero) digits is 129024, while the sum is 40.

The spelling of 221302728382 in words is "two hundred twenty-one billion, three hundred two million, seven hundred twenty-eight thousand, three hundred eighty-two".