144520613 has 12 divisors (see below), whose sum is σ = 149384100. Its totient is φ = 139806720.

The previous prime is 144520589. The next prime is 144520619. The reversal of 144520613 is 316025441.

144520613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 25230529 + 119290084 = 5023^2 + 10922^2 .

It is not a de Polignac number, because 144520613 - 2¹⁴ = 144504229 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 (144520619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250181 + ... + 250757.

It is an arithmetic number, because the mean of its divisors is an integer number (12448675).

Almost surely, 2^144520613 is an apocalyptic number.

It is an amenable number.

144520613 is a deficient number, since it is larger than the sum of its proper divisors (4863487).

144520613 is an equidigital number, since it uses as much as digits as its factorization.

144520613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 144520613 is about 12021.6726373662. The cubic root of 144520613 is about 524.7791821169.

The spelling of 144520613 in words is "one hundred forty-four million, five hundred twenty thousand, six hundred thirteen".