144740231 has 4 divisors (see below), whose sum is σ = 146021232. Its totient is φ = 143459232.

The previous prime is 144740207. The next prime is 144740257. The reversal of 144740231 is 132047441.

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

It is a cyclic number.

It is not a de Polignac number, because 144740231 - 2¹⁴ = 144723847 is a prime.

It is a super-2 number, since 2×144740231² = 41899468939866722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 144740231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144740831) 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, 640331 + ... + 640556.

It is an arithmetic number, because the mean of its divisors is an integer number (36505308).

Almost surely, 2^144740231 is an apocalyptic number.

144740231 is a deficient number, since it is larger than the sum of its proper divisors (1281001).

144740231 is a wasteful number, since it uses less digits than its factorization.

144740231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281000.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 144740231 is about 12030.8034228808. The cubic root of 144740231 is about 525.0448711459.

Adding to 144740231 its reverse (132047441), we get a palindrome (276787672).

The spelling of 144740231 in words is "one hundred forty-four million, seven hundred forty thousand, two hundred thirty-one".