31231320013001 has 8 divisors (see below), whose sum is σ = 33097136866344. Its totient is φ = 29368689868800.

The previous prime is 31231320012973. The next prime is 31231320013009. The reversal of 31231320013001 is 10031002313213.

It can be written as a sum of positive squares in 4 ways, for example, as 23302815635401 + 7928504377600 = 4827299^2 + 2815760^2 .

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-31231320013001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31231320013009) 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, 796657100 + ... + 796696301.

It is an arithmetic number, because the mean of its divisors is an integer number (4137142108293).

Almost surely, 2^{31231320013001} is an apocalyptic number.

It is an amenable number.

31231320013001 is a deficient number, since it is larger than the sum of its proper divisors (1865816853343).

31231320013001 is a wasteful number, since it uses less digits than its factorization.

31231320013001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1593354571.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31231320013001 its reverse (10031002313213), we get a palindrome (41262322326214).

The spelling of 31231320013001 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred twenty million, thirteen thousand, one".