221265443 has 8 divisors (see below), whose sum is σ = 254337888. Its totient is φ = 188558784.

The previous prime is 221265437. The next prime is 221265449. The reversal of 221265443 is 344562122.

It is an interprime number because it is at equal distance from previous prime (221265437) and next prime (221265449).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221265443 - 2⁶ = 221265379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221265449) 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, 90146 + ... + 92567.

It is an arithmetic number, because the mean of its divisors is an integer number (31792236).

Almost surely, 2^221265443 is an apocalyptic number.

221265443 is a deficient number, since it is larger than the sum of its proper divisors (33072445).

221265443 is a wasteful number, since it uses less digits than its factorization.

221265443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182893.

The product of its digits is 11520, while the sum is 29.

The square root of 221265443 is about 14874.9938823517. The cubic root of 221265443 is about 604.8363220907.

The spelling of 221265443 in words is "two hundred twenty-one million, two hundred sixty-five thousand, four hundred forty-three".