31325400205663 has 2 divisors, whose sum is σ = 31325400205664. Its totient is φ = 31325400205662.

The previous prime is 31325400205591. The next prime is 31325400205669. The reversal of 31325400205663 is 36650200452313.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31325400205663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31325400205669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15662700102831 + 15662700102832.

It is an arithmetic number, because the mean of its divisors is an integer number (15662700102832).

Almost surely, 2^{31325400205663} is an apocalyptic number.

31325400205663 is a deficient number, since it is larger than the sum of its proper divisors (1).

31325400205663 is an equidigital number, since it uses as much as digits as its factorization.

31325400205663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 40.

Adding to 31325400205663 its reverse (36650200452313), we get a palindrome (67975600657976).

The spelling of 31325400205663 in words is "thirty-one trillion, three hundred twenty-five billion, four hundred million, two hundred five thousand, six hundred sixty-three".