31526311349987 has 2 divisors, whose sum is σ = 31526311349988. Its totient is φ = 31526311349986.

The previous prime is 31526311349941. The next prime is 31526311350073. The reversal of 31526311349987 is 78994311362513.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31526311349987 - 2¹⁴ = 31526311333603 is a prime.

It is not a weakly prime, because it can be changed into another prime (31526311349587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15763155674993 + 15763155674994.

It is an arithmetic number, because the mean of its divisors is an integer number (15763155674994).

Almost surely, 2^{31526311349987} is an apocalyptic number.

31526311349987 is a deficient number, since it is larger than the sum of its proper divisors (1).

31526311349987 is an equidigital number, since it uses as much as digits as its factorization.

31526311349987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29393280, while the sum is 62.

The spelling of 31526311349987 in words is "thirty-one trillion, five hundred twenty-six billion, three hundred eleven million, three hundred forty-nine thousand, nine hundred eighty-seven".