220312331231 has 16 divisors (see below), whose sum is σ = 231834441600. Its totient is φ = 209053836768.

The previous prime is 220312331227. The next prime is 220312331237. The reversal of 220312331231 is 132133213022.

It is not a de Polignac number, because 220312331231 - 2² = 220312331227 is a prime.

It is a super-2 number, since 2×220312331231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220312331197 and 220312331206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220312331237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7244600 + ... + 7274946.

It is an arithmetic number, because the mean of its divisors is an integer number (14489652600).

Almost surely, 2^220312331231 is an apocalyptic number.

220312331231 is a deficient number, since it is larger than the sum of its proper divisors (11522110369).

220312331231 is a wasteful number, since it uses less digits than its factorization.

220312331231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34678.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 220312331231 its reverse (132133213022), we get a palindrome (352445544253).

The spelling of 220312331231 in words is "two hundred twenty billion, three hundred twelve million, three hundred thirty-one thousand, two hundred thirty-one".