221366225268 has 48 divisors (see below), whose sum is σ = 573988576000. Its totient is φ = 73778952384.

The previous prime is 221366225233. The next prime is 221366225273. The reversal of 221366225268 is 862522663122.

221366225268 is a `hidden beast` number, since 2 + 2 + 1 + 366 + 2 + 25 + 268 = 666.

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, 705888 + ... + 970056.

Almost surely, 2^221366225268 is an apocalyptic number.

It is an amenable number.

221366225268 is an abundant number, since it is smaller than the sum of its proper divisors (352622350732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221366225268 is a wasteful number, since it uses less digits than its factorization.

221366225268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271941 (or 271933 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The spelling of 221366225268 in words is "two hundred twenty-one billion, three hundred sixty-six million, two hundred twenty-five thousand, two hundred sixty-eight".