220231020 has 24 divisors (see below), whose sum is σ = 616647024. Its totient is φ = 58728256.

The previous prime is 220231007. The next prime is 220231021. The reversal of 220231020 is 20132022.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 220230987 and 220231005.

It is not an unprimeable number, because it can be changed into a prime (220231021) 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 7 ways as a sum of consecutive naturals, for example, 1835199 + ... + 1835318.

It is an arithmetic number, because the mean of its divisors is an integer number (25693626).

Almost surely, 2^220231020 is an apocalyptic number.

220231020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220231020 is an abundant number, since it is smaller than the sum of its proper divisors (396416004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220231020 is a wasteful number, since it uses less digits than its factorization.

220231020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3670529 (or 3670527 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 220231020 is about 14840.1826134317. The cubic root of 220231020 is about 603.8923064283.

Adding to 220231020 its reverse (20132022), we get a palindrome (240363042).

The spelling of 220231020 in words is "two hundred twenty million, two hundred thirty-one thousand, twenty".