220031013 has 4 divisors (see below), whose sum is σ = 293374688. Its totient is φ = 146687340.

The previous prime is 220031003. The next prime is 220031047. The reversal of 220031013 is 310130022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 220031013 - 2¹⁶ = 219965477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 220031013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220031003) 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, 36671833 + ... + 36671838.

It is an arithmetic number, because the mean of its divisors is an integer number (73343672).

Almost surely, 2^220031013 is an apocalyptic number.

It is an amenable number.

220031013 is a deficient number, since it is larger than the sum of its proper divisors (73343675).

220031013 is an equidigital number, since it uses as much as digits as its factorization.

220031013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73343674.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 220031013 is about 14833.4423853669. The cubic root of 220031013 is about 603.7094389547.

Adding to 220031013 its reverse (310130022), we get a palindrome (530161035).

Subtracting 220031013 from its reverse (310130022), we obtain a palindrome (90099009).

The spelling of 220031013 in words is "two hundred twenty million, thirty-one thousand, thirteen".