221325539 has 2 divisors, whose sum is σ = 221325540. Its totient is φ = 221325538.

The previous prime is 221325497. The next prime is 221325563. The reversal of 221325539 is 935523122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221325539 - 2¹⁶ = 221260003 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221325439) 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 as a sum of consecutive naturals, namely, 110662769 + 110662770.

It is an arithmetic number, because the mean of its divisors is an integer number (110662770).

Almost surely, 2^221325539 is an apocalyptic number.

221325539 is a deficient number, since it is larger than the sum of its proper divisors (1).

221325539 is an equidigital number, since it uses as much as digits as its factorization.

221325539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 32.

The square root of 221325539 is about 14877.0137796535. The cubic root of 221325539 is about 604.8910752608.

The spelling of 221325539 in words is "two hundred twenty-one million, three hundred twenty-five thousand, five hundred thirty-nine".