144420031 has 4 divisors (see below), whose sum is σ = 165051472. Its totient is φ = 123788592.

The previous prime is 144420011. The next prime is 144420037. The reversal of 144420031 is 130024441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130024441 = 79 ⋅1645879.

It is a cyclic number.

It is not a de Polignac number, because 144420031 - 2⁹ = 144419519 is a prime.

It is a super-2 number, since 2×144420031² = 41714290708081922, 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 = 144419990 and 144420008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144420037) 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, 10315710 + ... + 10315723.

It is an arithmetic number, because the mean of its divisors is an integer number (41262868).

Almost surely, 2^144420031 is an apocalyptic number.

144420031 is a deficient number, since it is larger than the sum of its proper divisors (20631441).

144420031 is an equidigital number, since it uses as much as digits as its factorization.

144420031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20631440.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 144420031 is about 12017.4885479454. The cubic root of 144420031 is about 524.6574103536.

Adding to 144420031 its reverse (130024441), we get a palindrome (274444472).

The spelling of 144420031 in words is "one hundred forty-four million, four hundred twenty thousand, thirty-one".