144311231 has 4 divisors (see below), whose sum is σ = 148966464. Its totient is φ = 139656000.

The previous prime is 144311201. The next prime is 144311239. The reversal of 144311231 is 132113441.

144311231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144311231 is a prime.

It is a super-2 number, since 2×144311231² = 41651462785470722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144311239) 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, 2327570 + ... + 2327631.

It is an arithmetic number, because the mean of its divisors is an integer number (37241616).

Almost surely, 2^144311231 is an apocalyptic number.

144311231 is a deficient number, since it is larger than the sum of its proper divisors (4655233).

144311231 is an equidigital number, since it uses as much as digits as its factorization.

144311231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4655232.

The product of its digits is 288, while the sum is 20.

The square root of 144311231 is about 12012.9609588977. The cubic root of 144311231 is about 524.5256256179.

Adding to 144311231 its reverse (132113441), we get a palindrome (276424672).

The spelling of 144311231 in words is "one hundred forty-four million, three hundred eleven thousand, two hundred thirty-one".