220331665 has 16 divisors (see below), whose sum is σ = 271042560. Its totient is φ = 171884160.

The previous prime is 220331641. The next prime is 220331689. The reversal of 220331665 is 566133022.

It is an interprime number because it is at equal distance from previous prime (220331641) and next prime (220331689).

It is not a de Polignac number, because 220331665 - 2⁷ = 220331537 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34525 + ... + 40405.

It is an arithmetic number, because the mean of its divisors is an integer number (16940160).

Almost surely, 2^220331665 is an apocalyptic number.

It is an amenable number.

220331665 is a deficient number, since it is larger than the sum of its proper divisors (50710895).

220331665 is a wasteful number, since it uses less digits than its factorization.

220331665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6072.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 220331665 is about 14843.5731884206. The cubic root of 220331665 is about 603.9842848198.

Adding to 220331665 its reverse (566133022), we get a palindrome (786464687).

The spelling of 220331665 in words is "two hundred twenty million, three hundred thirty-one thousand, six hundred sixty-five".