221256676 has 24 divisors (see below), whose sum is σ = 391279616. Its totient is φ = 109468800.

The previous prime is 221256617. The next prime is 221256677. The reversal of 221256676 is 676652122.

It is not an unprimeable number, because it can be changed into a prime (221256677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203005 + ... + 204091.

Almost surely, 2^221256676 is an apocalyptic number.

It is an amenable number.

221256676 is a deficient number, since it is larger than the sum of its proper divisors (170022940).

221256676 is a wasteful number, since it uses less digits than its factorization.

221256676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579 (or 1577 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The square root of 221256676 is about 14874.6991902357. The cubic root of 221256676 is about 604.8283336915.

The spelling of 221256676 in words is "two hundred twenty-one million, two hundred fifty-six thousand, six hundred seventy-six".