220131232 has 48 divisors (see below), whose sum is σ = 463066632. Its totient is φ = 102645760.

The previous prime is 220131227. The next prime is 220131239. The reversal of 220131232 is 232131022.

It can be written as a sum of positive squares in 4 ways, for example, as 194769936 + 25361296 = 13956^2 + 5036^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (220131239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59682 + ... + 63262.

Almost surely, 2^220131232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220131232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231533316).

220131232 is an abundant number, since it is smaller than the sum of its proper divisors (242935400).

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

220131232 is a wasteful number, since it uses less digits than its factorization.

220131232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3721 (or 3713 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 220131232 is about 14836.8201444919. The cubic root of 220131232 is about 603.8010835701.

Adding to 220131232 its reverse (232131022), we get a palindrome (452262254).

It can be divided in two parts, 2201 and 31232, that added together give a palindrome (33433).

The spelling of 220131232 in words is "two hundred twenty million, one hundred thirty-one thousand, two hundred thirty-two".