220831317 has 24 divisors (see below), whose sum is σ = 377120640. Its totient is φ = 121836960.

The previous prime is 220831313. The next prime is 220831327. The reversal of 220831317 is 713138022.

It is not a de Polignac number, because 220831317 - 2² = 220831313 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220831313) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58609 + ... + 62262.

It is an arithmetic number, because the mean of its divisors is an integer number (15713360).

Almost surely, 2^220831317 is an apocalyptic number.

It is an amenable number.

220831317 is a deficient number, since it is larger than the sum of its proper divisors (156289323).

220831317 is a wasteful number, since it uses less digits than its factorization.

220831317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120913 (or 120910 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 220831317 is about 14860.3942410691. The cubic root of 220831317 is about 604.4404972351.

Adding to 220831317 its reverse (713138022), we get a palindrome (933969339).

The spelling of 220831317 in words is "two hundred twenty million, eight hundred thirty-one thousand, three hundred seventeen".