220769643 has 4 divisors (see below), whose sum is σ = 294359528. Its totient is φ = 147179760.

The previous prime is 220769641. The next prime is 220769651. The reversal of 220769643 is 346967022.

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

It is not a de Polignac number, because 220769643 - 2¹ = 220769641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220769641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36794938 + ... + 36794943.

It is an arithmetic number, because the mean of its divisors is an integer number (73589882).

Almost surely, 2^220769643 is an apocalyptic number.

220769643 is a deficient number, since it is larger than the sum of its proper divisors (73589885).

220769643 is an equidigital number, since it uses as much as digits as its factorization.

220769643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73589884.

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 220769643 is about 14858.3189829805. The cubic root of 220769643 is about 604.3842224056.

The spelling of 220769643 in words is "two hundred twenty million, seven hundred sixty-nine thousand, six hundred forty-three".