31231230201 has 12 divisors (see below), whose sum is σ = 45558429540. Its totient is φ = 20614672800.

The previous prime is 31231230187. The next prime is 31231230223. The reversal of 31231230201 is 10203213213.

31231230201 is a `hidden beast` number, since 3 + 1 + 231 + 230 + 201 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13276570176 + 17954660025 = 115224^2 + 133995^2 .

It is not a de Polignac number, because 31231230201 - 2²¹ = 31229133049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31231234201) 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 11 ways as a sum of consecutive naturals, for example, 17177986 + ... + 17179803.

It is an arithmetic number, because the mean of its divisors is an integer number (3796535795).

Almost surely, 2^31231230201 is an apocalyptic number.

It is an amenable number.

31231230201 is a deficient number, since it is larger than the sum of its proper divisors (14327199339).

31231230201 is a wasteful number, since it uses less digits than its factorization.

31231230201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34357896 (or 34357893 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31231230201 its reverse (10203213213), we get a palindrome (41434443414).

The spelling of 31231230201 in words is "thirty-one billion, two hundred thirty-one million, two hundred thirty thousand, two hundred one".