144331013 has 4 divisors (see below), whose sum is σ = 144468108. Its totient is φ = 144193920.

The previous prime is 144330917. The next prime is 144331021. The reversal of 144331013 is 310133441.

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 35796289 + 108534724 = 5983^2 + 10418^2 .

It is a cyclic number.

It is not a de Polignac number, because 144331013 - 2¹⁶ = 144265477 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 (144331073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66956 + ... + 69077.

It is an arithmetic number, because the mean of its divisors is an integer number (36117027).

Almost surely, 2^144331013 is an apocalyptic number.

It is an amenable number.

144331013 is a deficient number, since it is larger than the sum of its proper divisors (137095).

144331013 is a wasteful number, since it uses less digits than its factorization.

144331013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137094.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 144331013 is about 12013.7842913880. The cubic root of 144331013 is about 524.5495916248.

Adding to 144331013 its reverse (310133441), we get a palindrome (454464454).

The spelling of 144331013 in words is "one hundred forty-four million, three hundred thirty-one thousand, thirteen".