221446045 has 16 divisors (see below), whose sum is σ = 280319040. Its totient is φ = 167474304.

The previous prime is 221446039. The next prime is 221446061. The reversal of 221446045 is 540644122.

It is a cyclic number.

It is not a de Polignac number, because 221446045 - 2³ = 221446037 is a prime.

It is a super-2 number, since 2×221446045² = 98076701692284050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47457 + ... + 51913.

It is an arithmetic number, because the mean of its divisors is an integer number (17519940).

Almost surely, 2^221446045 is an apocalyptic number.

It is an amenable number.

221446045 is a deficient number, since it is larger than the sum of its proper divisors (58872995).

221446045 is a wasteful number, since it uses less digits than its factorization.

221446045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5004.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 221446045 is about 14881.0633020628. The cubic root of 221446045 is about 605.0008378287. Note that the first 3 decimals are identical.

The spelling of 221446045 in words is "two hundred twenty-one million, four hundred forty-six thousand, forty-five".