220724459 has 2 divisors, whose sum is σ = 220724460. Its totient is φ = 220724458.

The previous prime is 220724437. The next prime is 220724467. The reversal of 220724459 is 954427022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220724459 - 2¹⁶ = 220658923 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (220724759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110362229 + 110362230.

It is an arithmetic number, because the mean of its divisors is an integer number (110362230).

Almost surely, 2^220724459 is an apocalyptic number.

220724459 is a deficient number, since it is larger than the sum of its proper divisors (1).

220724459 is an equidigital number, since it uses as much as digits as its factorization.

220724459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 220724459 is about 14856.7984101555. The cubic root of 220724459 is about 604.3429873282.

The spelling of 220724459 in words is "two hundred twenty million, seven hundred twenty-four thousand, four hundred fifty-nine".