220131032231 has 4 divisors (see below), whose sum is σ = 240142944264. Its totient is φ = 200119120200.

The previous prime is 220131032203. The next prime is 220131032263. The reversal of 220131032231 is 132230131022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220131032231 - 2⁶ = 220131032167 is a prime.

It is a super-2 number, since 2×220131032231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220131032831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10005956000 + ... + 10005956021.

It is an arithmetic number, because the mean of its divisors is an integer number (60035736066).

Almost surely, 2^220131032231 is an apocalyptic number.

220131032231 is a deficient number, since it is larger than the sum of its proper divisors (20011912033).

220131032231 is a wasteful number, since it uses less digits than its factorization.

220131032231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20011912032.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 220131032231 its reverse (132230131022), we get a palindrome (352361163253).

The spelling of 220131032231 in words is "two hundred twenty billion, one hundred thirty-one million, thirty-two thousand, two hundred thirty-one".