220220313231 has 4 divisors (see below), whose sum is σ = 293627084312. Its totient is φ = 146813542152.

The previous prime is 220220313193. The next prime is 220220313281. The reversal of 220220313231 is 132313022022.

It is a happy number.

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

It is not a de Polignac number, because 220220313231 - 2⁶ = 220220313167 is a prime.

It is a super-2 number, since 2×220220313231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220220313198 and 220220313207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220220313281) 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, 36703385536 + ... + 36703385541.

It is an arithmetic number, because the mean of its divisors is an integer number (73406771078).

Almost surely, 2^220220313231 is an apocalyptic number.

220220313231 is a deficient number, since it is larger than the sum of its proper divisors (73406771081).

220220313231 is an equidigital number, since it uses as much as digits as its factorization.

220220313231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73406771080.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 220220313231 its reverse (132313022022), we get a palindrome (352533335253).

The spelling of 220220313231 in words is "two hundred twenty billion, two hundred twenty million, three hundred thirteen thousand, two hundred thirty-one".