31543203541 has 2 divisors, whose sum is σ = 31543203542. Its totient is φ = 31543203540.

The previous prime is 31543203493. The next prime is 31543203553. The reversal of 31543203541 is 14530234513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31169902500 + 373301041 = 176550^2 + 19321^2 .

It is an emirp because it is prime and its reverse (14530234513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31543203541 - 2⁷ = 31543203413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31543203581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15771601770 + 15771601771.

It is an arithmetic number, because the mean of its divisors is an integer number (15771601771).

Almost surely, 2^31543203541 is an apocalyptic number.

It is an amenable number.

31543203541 is a deficient number, since it is larger than the sum of its proper divisors (1).

31543203541 is an equidigital number, since it uses as much as digits as its factorization.

31543203541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 31.

The spelling of 31543203541 in words is "thirty-one billion, five hundred forty-three million, two hundred three thousand, five hundred forty-one".