144331213 has 4 divisors (see below), whose sum is σ = 155433628. Its totient is φ = 133228800.

The previous prime is 144331157. The next prime is 144331217. The reversal of 144331213 is 312133441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20187049 + 124144164 = 4493^2 + 11142^2 .

It is a cyclic number.

It is not a de Polignac number, because 144331213 - 2¹⁷ = 144200141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144331217) 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 3 ways as a sum of consecutive naturals, for example, 5551188 + ... + 5551213.

It is an arithmetic number, because the mean of its divisors is an integer number (38858407).

Almost surely, 2^144331213 is an apocalyptic number.

144331213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

144331213 is a deficient number, since it is larger than the sum of its proper divisors (11102415).

144331213 is a wasteful number, since it uses less digits than its factorization.

144331213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11102414.

The product of its digits is 864, while the sum is 22.

The square root of 144331213 is about 12013.7926151570. The cubic root of 144331213 is about 524.5498339147.

Adding to 144331213 its reverse (312133441), we get a palindrome (456464654).

The spelling of 144331213 in words is "one hundred forty-four million, three hundred thirty-one thousand, two hundred thirteen".