144320431 has 8 divisors (see below), whose sum is σ = 149538960. Its totient is φ = 139194432.

The previous prime is 144320417. The next prime is 144320441. The reversal of 144320431 is 134023441.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144320431 is a prime.

It is a super-2 number, since 2×144320431² = 41656773608051522, 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 (144320441) 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, 19950 + ... + 26203.

It is an arithmetic number, because the mean of its divisors is an integer number (18692370).

Almost surely, 2^144320431 is an apocalyptic number.

144320431 is a deficient number, since it is larger than the sum of its proper divisors (5218529).

144320431 is an equidigital number, since it uses as much as digits as its factorization.

144320431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46265.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 144320431 is about 12013.3438725444. The cubic root of 144320431 is about 524.5367717433.

Adding to 144320431 its reverse (134023441), we get a palindrome (278343872).

The spelling of 144320431 in words is "one hundred forty-four million, three hundred twenty thousand, four hundred thirty-one".