144431220 has 48 divisors (see below), whose sum is σ = 405776448. Its totient is φ = 38384640.

The previous prime is 144431219. The next prime is 144431227. The reversal of 144431220 is 22134441.

144431220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144431227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14500 + ... + 22340.

It is an arithmetic number, because the mean of its divisors is an integer number (8453676).

Almost surely, 2^144431220 is an apocalyptic number.

144431220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144431220 is an abundant number, since it is smaller than the sum of its proper divisors (261345228).

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

144431220 is a wasteful number, since it uses less digits than its factorization.

144431220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8160 (or 8158 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 144431220 is about 12017.9540688089. The cubic root of 144431220 is about 524.6709593517.

Adding to 144431220 its reverse (22134441), we get a palindrome (166565661).

The spelling of 144431220 in words is "one hundred forty-four million, four hundred thirty-one thousand, two hundred twenty".