320031123551 has 8 divisors (see below), whose sum is σ = 321269436000. Its totient is φ = 318793171680.

The previous prime is 320031123491. The next prime is 320031123619. The reversal of 320031123551 is 155321130023.

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 320031123551 - 2⁶ = 320031123487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320031123551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320031123751) 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, 1761725 + ... + 1934873.

It is an arithmetic number, because the mean of its divisors is an integer number (40158679500).

Almost surely, 2^320031123551 is an apocalyptic number.

320031123551 is a deficient number, since it is larger than the sum of its proper divisors (1238312449).

320031123551 is a wasteful number, since it uses less digits than its factorization.

320031123551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180289.

The product of its (nonzero) digits is 2700, while the sum is 26.

Adding to 320031123551 its reverse (155321130023), we get a palindrome (475352253574).

The spelling of 320031123551 in words is "three hundred twenty billion, thirty-one million, one hundred twenty-three thousand, five hundred fifty-one".