220736009 has 8 divisors (see below), whose sum is σ = 239898120. Its totient is φ = 201885696.

The previous prime is 220735993. The next prime is 220736029. The reversal of 220736009 is 900637022.

It can be written as a sum of positive squares in 4 ways, for example, as 14899600 + 205836409 = 3860^2 + 14347^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 220736009 - 2⁴ = 220735993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220736029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76472 + ... + 79305.

It is an arithmetic number, because the mean of its divisors is an integer number (29987265).

Almost surely, 2^220736009 is an apocalyptic number.

It is an amenable number.

220736009 is a deficient number, since it is larger than the sum of its proper divisors (19162111).

220736009 is a wasteful number, since it uses less digits than its factorization.

220736009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155899.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 220736009 is about 14857.1871160055. The cubic root of 220736009 is about 604.3535284342.

It can be divided in two parts, 22073 and 6009, that added together give a palindrome (28082).

The spelling of 220736009 in words is "two hundred twenty million, seven hundred thirty-six thousand, nine".