144220031 has 4 divisors (see below), whose sum is σ = 145083792. Its totient is φ = 143356272.

The previous prime is 144220007. The next prime is 144220033. The reversal of 144220031 is 130022441.

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-144220031 is a prime.

It is a super-2 number, since 2×144220031² = 41598834683281922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 144219991 and 144220009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144220033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 431630 + ... + 431963.

It is an arithmetic number, because the mean of its divisors is an integer number (36270948).

Almost surely, 2^144220031 is an apocalyptic number.

144220031 is a deficient number, since it is larger than the sum of its proper divisors (863761).

144220031 is an equidigital number, since it uses as much as digits as its factorization.

144220031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863760.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 144220031 is about 12009.1644588622. The cubic root of 144220031 is about 524.4151079603.

Adding to 144220031 its reverse (130022441), we get a palindrome (274242472).

The spelling of 144220031 in words is "one hundred forty-four million, two hundred twenty thousand, thirty-one".