31368402287 has 2 divisors, whose sum is σ = 31368402288. Its totient is φ = 31368402286.

The previous prime is 31368402277. The next prime is 31368402311. The reversal of 31368402287 is 78220486313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31368402287 - 2¹⁸ = 31368140143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31368402217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15684201143 + 15684201144.

It is an arithmetic number, because the mean of its divisors is an integer number (15684201144).

Almost surely, 2^31368402287 is an apocalyptic number.

31368402287 is a deficient number, since it is larger than the sum of its proper divisors (1).

31368402287 is an equidigital number, since it uses as much as digits as its factorization.

31368402287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 44.

The spelling of 31368402287 in words is "thirty-one billion, three hundred sixty-eight million, four hundred two thousand, two hundred eighty-seven".