221808943352 has 16 divisors (see below), whose sum is σ = 420009510600. Its totient is φ = 109806407200.

The previous prime is 221808943331. The next prime is 221808943357. The reversal of 221808943352 is 253349808122.

It is a junction number, because it is equal to n+sod(n) for n = 221808943297 and 221808943306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221808943357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137257202 + ... + 137258817.

Almost surely, 2^221808943352 is an apocalyptic number.

It is an amenable number.

221808943352 is a deficient number, since it is larger than the sum of its proper divisors (198200567248).

221808943352 is a wasteful number, since it uses less digits than its factorization.

221808943352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274516126 (or 274516122 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 221808943352 in words is "two hundred twenty-one billion, eight hundred eight million, nine hundred forty-three thousand, three hundred fifty-two".