320144143551 has 8 divisors (see below), whose sum is σ = 426932464944. Its totient is φ = 213392625600.

The previous prime is 320144143523. The next prime is 320144143591. The reversal of 320144143551 is 155341441023.

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

It is not a de Polignac number, because 320144143551 - 2²³ = 320135754943 is a prime.

It is a super-3 number, since 3×320144143551³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320144143511) 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, 9180556 + ... + 9215361.

It is an arithmetic number, because the mean of its divisors is an integer number (53366558118).

Almost surely, 2^320144143551 is an apocalyptic number.

320144143551 is a deficient number, since it is larger than the sum of its proper divisors (106788321393).

320144143551 is a wasteful number, since it uses less digits than its factorization.

320144143551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18401721.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 320144143551 its reverse (155341441023), we get a palindrome (475485584574).

The spelling of 320144143551 in words is "three hundred twenty billion, one hundred forty-four million, one hundred forty-three thousand, five hundred fifty-one".