221253571228 has 12 divisors (see below), whose sum is σ = 389512276272. Its totient is φ = 109964349440.

The previous prime is 221253571223. The next prime is 221253571241. The reversal of 221253571228 is 822175352122.

It is a super-3 number, since 3×221253571228³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221253571223) 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, 165608293 + ... + 165609628.

It is an arithmetic number, because the mean of its divisors is an integer number (32459356356).

Almost surely, 2^221253571228 is an apocalyptic number.

It is an amenable number.

221253571228 is a deficient number, since it is larger than the sum of its proper divisors (168258705044).

221253571228 is a wasteful number, since it uses less digits than its factorization.

221253571228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331218092 (or 331218090 counting only the distinct ones).

The product of its digits is 134400, while the sum is 40.

The spelling of 221253571228 in words is "two hundred twenty-one billion, two hundred fifty-three million, five hundred seventy-one thousand, two hundred twenty-eight".