31361555653 has 2 divisors, whose sum is σ = 31361555654. Its totient is φ = 31361555652.

The previous prime is 31361555639. The next prime is 31361555663. The reversal of 31361555653 is 35655516313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17853769924 + 13507785729 = 133618^2 + 116223^2 .

It is an emirp because it is prime and its reverse (35655516313) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31361555653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31361555663) 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, 15680777826 + 15680777827.

It is an arithmetic number, because the mean of its divisors is an integer number (15680777827).

Almost surely, 2^31361555653 is an apocalyptic number.

It is an amenable number.

31361555653 is a deficient number, since it is larger than the sum of its proper divisors (1).

31361555653 is an equidigital number, since it uses as much as digits as its factorization.

31361555653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 607500, while the sum is 43.

The spelling of 31361555653 in words is "thirty-one billion, three hundred sixty-one million, five hundred fifty-five thousand, six hundred fifty-three".