220544131 has 2 divisors, whose sum is σ = 220544132. Its totient is φ = 220544130.

The previous prime is 220544123. The next prime is 220544141. The reversal of 220544131 is 131445022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220544131 - 2³ = 220544123 is a prime.

It is a super-2 number, since 2×220544131² = 97279427437090322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (220544141) 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 as a sum of consecutive naturals, namely, 110272065 + 110272066.

It is an arithmetic number, because the mean of its divisors is an integer number (110272066).

Almost surely, 2^220544131 is an apocalyptic number.

220544131 is a deficient number, since it is larger than the sum of its proper divisors (1).

220544131 is an equidigital number, since it uses as much as digits as its factorization.

220544131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 220544131 is about 14850.7282986391. The cubic root of 220544131 is about 604.1783632921.

Adding to 220544131 its reverse (131445022), we get a palindrome (351989153).

The spelling of 220544131 in words is "two hundred twenty million, five hundred forty-four thousand, one hundred thirty-one".