31210320401 has 8 divisors (see below), whose sum is σ = 34519523304. Its totient is φ = 28030890240.

The previous prime is 31210320391. The next prime is 31210320403. The reversal of 31210320401 is 10402301213.

It can be written as a sum of positive squares in 4 ways, for example, as 925619776 + 30284700625 = 30424^2 + 174025^2 .

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-31210320401 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 31210320401.

It is not an unprimeable number, because it can be changed into a prime (31210320403) 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, 32442680 + ... + 32443641.

It is an arithmetic number, because the mean of its divisors is an integer number (4314940413).

Almost surely, 2^31210320401 is an apocalyptic number.

It is an amenable number.

31210320401 is a deficient number, since it is larger than the sum of its proper divisors (3309202903).

31210320401 is a wasteful number, since it uses less digits than its factorization.

31210320401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64886371.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31210320401 its reverse (10402301213), we get a palindrome (41612621614).

The spelling of 31210320401 in words is "thirty-one billion, two hundred ten million, three hundred twenty thousand, four hundred one".