31043440201 has 2 divisors, whose sum is σ = 31043440202. Its totient is φ = 31043440200.

The previous prime is 31043440123. The next prime is 31043440229. The reversal of 31043440201 is 10204434013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30744115600 + 299324601 = 175340^2 + 17301^2 .

It is a cyclic number.

It is not a de Polignac number, because 31043440201 - 2¹⁹ = 31042915913 is a prime.

It is not a weakly prime, because it can be changed into another prime (31043440231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15521720100 + 15521720101.

It is an arithmetic number, because the mean of its divisors is an integer number (15521720101).

Almost surely, 2^31043440201 is an apocalyptic number.

It is an amenable number.

31043440201 is a deficient number, since it is larger than the sum of its proper divisors (1).

31043440201 is an equidigital number, since it uses as much as digits as its factorization.

31043440201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 31043440201 its reverse (10204434013), we get a palindrome (41247874214).

The spelling of 31043440201 in words is "thirty-one billion, forty-three million, four hundred forty thousand, two hundred one".