144531313 has 8 divisors (see below), whose sum is σ = 146736968. Its totient is φ = 142331904.

The previous prime is 144531307. The next prime is 144531329. The reversal of 144531313 is 313135441.

It can be written as a sum of positive squares in 4 ways, for example, as 7360369 + 137170944 = 2713^2 + 11712^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 144531313 - 2⁵ = 144531281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144531353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67345 + ... + 69457.

It is an arithmetic number, because the mean of its divisors is an integer number (18342121).

Almost surely, 2^144531313 is an apocalyptic number.

It is an amenable number.

144531313 is a deficient number, since it is larger than the sum of its proper divisors (2205655).

144531313 is an equidigital number, since it uses as much as digits as its factorization.

144531313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3123.

The product of its digits is 2160, while the sum is 25.

The square root of 144531313 is about 12022.1176587155. The cubic root of 144531313 is about 524.7921329769.

Adding to 144531313 its reverse (313135441), we get a palindrome (457666754).

The spelling of 144531313 in words is "one hundred forty-four million, five hundred thirty-one thousand, three hundred thirteen".