221044379 has 2 divisors, whose sum is σ = 221044380. Its totient is φ = 221044378.

The previous prime is 221044357. The next prime is 221044391. The reversal of 221044379 is 973440122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221044379 is a prime.

It is equal to p_12176861 and since 221044379 and 12176861 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (221044339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110522189 + 110522190.

It is an arithmetic number, because the mean of its divisors is an integer number (110522190).

Almost surely, 2^221044379 is an apocalyptic number.

221044379 is a deficient number, since it is larger than the sum of its proper divisors (1).

221044379 is an equidigital number, since it uses as much as digits as its factorization.

221044379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 221044379 is about 14867.5612996887. The cubic root of 221044379 is about 604.6348264147.

It can be divided in two parts, 22 and 1044379, that added together give a palindrome (1044401).

The spelling of 221044379 in words is "two hundred twenty-one million, forty-four thousand, three hundred seventy-nine".