220131331 has 4 divisors (see below), whose sum is σ = 251578672. Its totient is φ = 188683992.

The previous prime is 220131323. The next prime is 220131343. The reversal of 220131331 is 133131022.

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

It is not a de Polignac number, because 220131331 - 2³ = 220131323 is a prime.

It is a super-2 number, since 2×220131331² = 96915605775663122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220131391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15723660 + ... + 15723673.

It is an arithmetic number, because the mean of its divisors is an integer number (62894668).

Almost surely, 2^220131331 is an apocalyptic number.

220131331 is a deficient number, since it is larger than the sum of its proper divisors (31447341).

220131331 is an equidigital number, since it uses as much as digits as its factorization.

220131331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31447340.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 220131331 is about 14836.8234807859. The cubic root of 220131331 is about 603.8011740862.

Adding to 220131331 its reverse (133131022), we get a palindrome (353262353).

The spelling of 220131331 in words is "two hundred twenty million, one hundred thirty-one thousand, three hundred thirty-one".