144640015 has 8 divisors (see below), whose sum is σ = 186919488. Its totient is φ = 106811040.

The previous prime is 144639997. The next prime is 144640019. The reversal of 144640015 is 510046441.

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

It is not a de Polignac number, because 144640015 - 2¹¹ = 144637967 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 (144640019) 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, 1112551 + ... + 1112680.

It is an arithmetic number, because the mean of its divisors is an integer number (23364936).

Almost surely, 2^144640015 is an apocalyptic number.

144640015 is a deficient number, since it is larger than the sum of its proper divisors (42279473).

144640015 is a wasteful number, since it uses less digits than its factorization.

144640015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2225249.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 144640015 is about 12026.6377263140. The cubic root of 144640015 is about 524.9236653944.

Adding to 144640015 its reverse (510046441), we get a palindrome (654686456).

The spelling of 144640015 in words is "one hundred forty-four million, six hundred forty thousand, fifteen".