221449283 has 4 divisors (see below), whose sum is σ = 241581048. Its totient is φ = 201317520.

The previous prime is 221449273. The next prime is 221449297. The reversal of 221449283 is 382944122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221449283 - 2¹⁰ = 221448259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221449253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10065866 + ... + 10065887.

It is an arithmetic number, because the mean of its divisors is an integer number (60395262).

Almost surely, 2^221449283 is an apocalyptic number.

221449283 is a deficient number, since it is larger than the sum of its proper divisors (20131765).

221449283 is a wasteful number, since it uses less digits than its factorization.

221449283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20131764.

The product of its digits is 27648, while the sum is 35.

The square root of 221449283 is about 14881.1720976541. The cubic root of 221449283 is about 605.0037866029.

The spelling of 221449283 in words is "two hundred twenty-one million, four hundred forty-nine thousand, two hundred eighty-three".