221444039 has 2 divisors, whose sum is σ = 221444040. Its totient is φ = 221444038.

The previous prime is 221444033. The next prime is 221444071. The reversal of 221444039 is 930444122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221444039 - 2²⁴ = 204666823 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221444033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110722019 + 110722020.

It is an arithmetic number, because the mean of its divisors is an integer number (110722020).

Almost surely, 2^221444039 is an apocalyptic number.

221444039 is a deficient number, since it is larger than the sum of its proper divisors (1).

221444039 is an equidigital number, since it uses as much as digits as its factorization.

221444039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 221444039 is about 14880.9959008126. The cubic root of 221444039 is about 604.9990109949. Note that the first 3 decimals are identical.

The spelling of 221444039 in words is "two hundred twenty-one million, four hundred forty-four thousand, thirty-nine".