220459447 has 4 divisors (see below), whose sum is σ = 237417880. Its totient is φ = 203501016.

The previous prime is 220459403. The next prime is 220459457. The reversal of 220459447 is 744954022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 744954022 = 2 ⋅372477011.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220459447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220459457) 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 in 3 ways as a sum of consecutive naturals, for example, 8479197 + ... + 8479222.

It is an arithmetic number, because the mean of its divisors is an integer number (59354470).

Almost surely, 2^220459447 is an apocalyptic number.

220459447 is a deficient number, since it is larger than the sum of its proper divisors (16958433).

220459447 is a wasteful number, since it uses less digits than its factorization.

220459447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16958432.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 220459447 is about 14847.8768515906. The cubic root of 220459447 is about 604.1010230786.

The spelling of 220459447 in words is "two hundred twenty million, four hundred fifty-nine thousand, four hundred forty-seven".