320342551 has 8 divisors (see below), whose sum is σ = 338503680. Its totient is φ = 302534232.

The previous prime is 320342513. The next prime is 320342591. The reversal of 320342551 is 155243023.

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

It is a cyclic number.

It is not a de Polignac number, because 320342551 - 2⁹ = 320342039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320342501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86335 + ... + 89968.

It is an arithmetic number, because the mean of its divisors is an integer number (42312960).

Almost surely, 2^320342551 is an apocalyptic number.

320342551 is a deficient number, since it is larger than the sum of its proper divisors (18161129).

320342551 is a wasteful number, since it uses less digits than its factorization.

320342551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176405.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 320342551 is about 17898.1158505581. The cubic root of 320342551 is about 684.2343557889.

Adding to 320342551 its reverse (155243023), we get a palindrome (475585574).

It can be divided in two parts, 3203 and 42551, that added together give a palindrome (45754).

The spelling of 320342551 in words is "three hundred twenty million, three hundred forty-two thousand, five hundred fifty-one".