221929823228 has 48 divisors (see below), whose sum is σ = 436170873600. Its totient is φ = 98185501440.

The previous prime is 221929823123. The next prime is 221929823231. The reversal of 221929823228 is 822328929122.

It is a super-2 number, since 2×221929823228² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 486368 + ... + 824871.

It is an arithmetic number, because the mean of its divisors is an integer number (9086893200).

Almost surely, 2^221929823228 is an apocalyptic number.

It is an amenable number.

221929823228 is a deficient number, since it is larger than the sum of its proper divisors (214241050372).

221929823228 is a wasteful number, since it uses less digits than its factorization.

221929823228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311410 (or 1311408 counting only the distinct ones).

The product of its digits is 995328, while the sum is 50.

The spelling of 221929823228 in words is "two hundred twenty-one billion, nine hundred twenty-nine million, eight hundred twenty-three thousand, two hundred twenty-eight".