221157056 has 28 divisors (see below), whose sum is σ = 439353960. Its totient is φ = 110453760.

The previous prime is 221157037. The next prime is 221157059. The reversal of 221157056 is 650751122.

It is not an unprimeable number, because it can be changed into a prime (221157059) 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 3 ways as a sum of consecutive naturals, for example, 85835 + ... + 88373.

Almost surely, 2^221157056 is an apocalyptic number.

It is an amenable number.

221157056 is a deficient number, since it is larger than the sum of its proper divisors (218196904).

221157056 is a wasteful number, since it uses less digits than its factorization.

221157056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3912 (or 3902 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 221157056 is about 14871.3501740763. The cubic root of 221157056 is about 604.7375461578.

The spelling of 221157056 in words is "two hundred twenty-one million, one hundred fifty-seven thousand, fifty-six".