31144500002201 has 4 divisors (see below), whose sum is σ = 31145186397492. Its totient is φ = 31143813606912.

The previous prime is 31144500002177. The next prime is 31144500002207. The reversal of 31144500002201 is 10220000544113.

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 6955061190025 + 24189438812176 = 2637245^2 + 4918276^2 .

It is a cyclic number.

It is not a de Polignac number, because 31144500002201 - 2¹⁰ = 31144500001177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31144500002207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343129580 + ... + 343220333.

It is an arithmetic number, because the mean of its divisors is an integer number (7786296599373).

Almost surely, 2^{31144500002201} is an apocalyptic number.

It is an amenable number.

31144500002201 is a deficient number, since it is larger than the sum of its proper divisors (686395291).

31144500002201 is an equidigital number, since it uses as much as digits as its factorization.

31144500002201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686395290.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 31144500002201 its reverse (10220000544113), we get a palindrome (41364500546314).

The spelling of 31144500002201 in words is "thirty-one trillion, one hundred forty-four billion, five hundred million, two thousand, two hundred one".