221441 has 8 divisors (see below), whose sum is σ = 247968. Its totient is φ = 196000.

The previous prime is 221413. The next prime is 221447. The reversal of 221441 is 144122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221441 is a prime.

It is a super-2 number, since 2×221441² = 98072232962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206 + ... + 696.

It is an arithmetic number, because the mean of its divisors is an integer number (30996).

2²²¹⁴⁴¹ is an apocalyptic number.

It is an amenable number.

221441 is a deficient number, since it is larger than the sum of its proper divisors (26527).

221441 is a wasteful number, since it uses less digits than its factorization.

221441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543.

The product of its digits is 64, while the sum is 14.

The square root of 221441 is about 470.5751799660. The cubic root of 221441 is about 60.4996243403.

Adding to 221441 its reverse (144122), we get a palindrome (365563).

It can be divided in two parts, 221 and 441, that multiplied together give a triangular number (97461 = T₄₄₁).

The spelling of 221441 in words is "two hundred twenty-one thousand, four hundred forty-one", and thus it is an iban number.