31230405001 has 4 divisors (see below), whose sum is σ = 31230904900. Its totient is φ = 31229905104.

The previous prime is 31230404987. The next prime is 31230405007. The reversal of 31230405001 is 10050403213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29984385600 + 1246019401 = 173160^2 + 35299^2 .

It is a cyclic number.

It is not a de Polignac number, because 31230405001 - 2⁷ = 31230404873 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 31230405001.

It is not an unprimeable number, because it can be changed into a prime (31230405007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140166 + ... + 286543.

It is an arithmetic number, because the mean of its divisors is an integer number (7807726225).

Almost surely, 2^31230405001 is an apocalyptic number.

It is an amenable number.

31230405001 is a deficient number, since it is larger than the sum of its proper divisors (499899).

31230405001 is an equidigital number, since it uses as much as digits as its factorization.

31230405001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499898.

The product of its (nonzero) digits is 360, while the sum is 19.

Adding to 31230405001 its reverse (10050403213), we get a palindrome (41280808214).

The spelling of 31230405001 in words is "thirty-one billion, two hundred thirty million, four hundred five thousand, one".