220131031 has 4 divisors (see below), whose sum is σ = 227232064. Its totient is φ = 213030000.

The previous prime is 220130987. The next prime is 220131047. The reversal of 220131031 is 130131022.

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 220131031 - 2¹³ = 220122839 is a prime.

It is a super-2 number, since 2×220131031² = 96915341618245922, which 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 (220131071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3550470 + ... + 3550531.

It is an arithmetic number, because the mean of its divisors is an integer number (56808016).

Almost surely, 2^220131031 is an apocalyptic number.

220131031 is a deficient number, since it is larger than the sum of its proper divisors (7101033).

220131031 is an equidigital number, since it uses as much as digits as its factorization.

220131031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7101032.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 220131031 is about 14836.8133708017. The cubic root of 220131031 is about 603.8008997948.

Adding to 220131031 its reverse (130131022), we get a palindrome (350262053).

Subtracting from 220131031 its reverse (130131022), we obtain a palindrome (90000009).

The spelling of 220131031 in words is "two hundred twenty million, one hundred thirty-one thousand, thirty-one".