220551729 has 8 divisors (see below), whose sum is σ = 294392640. Its totient is φ = 146872656.

The previous prime is 220551703. The next prime is 220551733. The reversal of 220551729 is 927155022.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 220551729 - 2⁵ = 220551697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220551729.

It is not an unprimeable number, because it can be changed into a prime (220551229) 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 in 7 ways as a sum of consecutive naturals, for example, 37242 + ... + 42755.

It is an arithmetic number, because the mean of its divisors is an integer number (36799080).

Almost surely, 2^220551729 is an apocalyptic number.

It is an amenable number.

220551729 is a deficient number, since it is larger than the sum of its proper divisors (73840911).

220551729 is an equidigital number, since it uses as much as digits as its factorization.

220551729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80919.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 220551729 is about 14850.9841088057. The cubic root of 220551729 is about 604.1853014265.

The spelling of 220551729 in words is "two hundred twenty million, five hundred fifty-one thousand, seven hundred twenty-nine".