220639049 has 6 divisors (see below), whose sum is σ = 221446350. Its totient is φ = 219833600.

The previous prime is 220639033. The next prime is 220639057. The reversal of 220639049 is 940936022.

It can be written as a sum of positive squares in 3 ways, for example, as 125440000 + 95199049 = 11200^2 + 9757^2 .

It is not a de Polignac number, because 220639049 - 2⁴ = 220639033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220639079) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 314399 + ... + 315099.

It is an arithmetic number, because the mean of its divisors is an integer number (36907725).

Almost surely, 2^220639049 is an apocalyptic number.

It is an amenable number.

220639049 is a deficient number, since it is larger than the sum of its proper divisors (807301).

220639049 is an frugal number, since it uses more digits than its factorization.

220639049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851 (or 1150 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 220639049 is about 14853.9236903924. The cubic root of 220639049 is about 604.2650264866.

The spelling of 220639049 in words is "two hundred twenty million, six hundred thirty-nine thousand, forty-nine".