144219285 has 96 divisors (see below), whose sum is σ = 306388992. Its totient is φ = 63685440.

The previous prime is 144219281. The next prime is 144219287. The reversal of 144219285 is 582912441.

It is not a de Polignac number, because 144219285 - 2² = 144219281 is a prime.

It is a super-2 number, since 2×144219285² = 41598404331822450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144219281) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 263382 + ... + 263928.

It is an arithmetic number, because the mean of its divisors is an integer number (3191552).

Almost surely, 2^144219285 is an apocalyptic number.

144219285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

144219285 is an abundant number, since it is smaller than the sum of its proper divisors (162169707).

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

144219285 is an equidigital number, since it uses as much as digits as its factorization.

144219285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605 (or 593 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 144219285 is about 12009.1333992091. The cubic root of 144219285 is about 524.4142037531.

The spelling of 144219285 in words is "one hundred forty-four million, two hundred nineteen thousand, two hundred eighty-five".