144211220 has 12 divisors (see below), whose sum is σ = 302843604. Its totient is φ = 57684480.

The previous prime is 144211217. The next prime is 144211231. The reversal of 144211220 is 22112441.

It can be written as a sum of positive squares in 2 ways, for example, as 47306884 + 96904336 = 6878^2 + 9844^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3605261 + ... + 3605300.

It is an arithmetic number, because the mean of its divisors is an integer number (25236967).

Almost surely, 2^144211220 is an apocalyptic number.

144211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144211220 is an abundant number, since it is smaller than the sum of its proper divisors (158632384).

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

144211220 is a wasteful number, since it uses less digits than its factorization.

144211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7210570 (or 7210568 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 144211220 is about 12008.7976084203. The cubic root of 144211220 is about 524.4044281779.

Adding to 144211220 its reverse (22112441), we get a palindrome (166323661).

The spelling of 144211220 in words is "one hundred forty-four million, two hundred eleven thousand, two hundred twenty".