31240544201 has 2 divisors, whose sum is σ = 31240544202. Its totient is φ = 31240544200.

The previous prime is 31240544197. The next prime is 31240544311. The reversal of 31240544201 is 10244504213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29618065801 + 1622478400 = 172099^2 + 40280^2 .

It is an emirp because it is prime and its reverse (10244504213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31240544201 - 2² = 31240544197 is a prime.

It is not a weakly prime, because it can be changed into another prime (31240544801) 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, 15620272100 + 15620272101.

It is an arithmetic number, because the mean of its divisors is an integer number (15620272101).

Almost surely, 2^31240544201 is an apocalyptic number.

It is an amenable number.

31240544201 is a deficient number, since it is larger than the sum of its proper divisors (1).

31240544201 is an equidigital number, since it uses as much as digits as its factorization.

31240544201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 26.

The spelling of 31240544201 in words is "thirty-one billion, two hundred forty million, five hundred forty-four thousand, two hundred one".