220454491 has 4 divisors (see below), whose sum is σ = 228056400. Its totient is φ = 212852584.

The previous prime is 220454467. The next prime is 220454537. The reversal of 220454491 is 194454022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220454491 - 2⁵ = 220454459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220454191) 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, 3800911 + ... + 3800968.

It is an arithmetic number, because the mean of its divisors is an integer number (57014100).

Almost surely, 2^220454491 is an apocalyptic number.

220454491 is a deficient number, since it is larger than the sum of its proper divisors (7601909).

220454491 is an equidigital number, since it uses as much as digits as its factorization.

220454491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7601908.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 220454491 is about 14847.7099581047. The cubic root of 220454491 is about 604.0964962489.

The spelling of 220454491 in words is "two hundred twenty million, four hundred fifty-four thousand, four hundred ninety-one".