31500110491 has 2 divisors, whose sum is σ = 31500110492. Its totient is φ = 31500110490.

The previous prime is 31500110489. The next prime is 31500110527. The reversal of 31500110491 is 19401100513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31500110491 - 2¹ = 31500110489 is a prime.

It is a super-2 number, since 2×31500110491² (a number of 22 digits) contains 22 as substring.

Together with 31500110489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31500110591) 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, 15750055245 + 15750055246.

It is an arithmetic number, because the mean of its divisors is an integer number (15750055246).

Almost surely, 2^31500110491 is an apocalyptic number.

31500110491 is a deficient number, since it is larger than the sum of its proper divisors (1).

31500110491 is an equidigital number, since it uses as much as digits as its factorization.

31500110491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 25.

The spelling of 31500110491 in words is "thirty-one billion, five hundred million, one hundred ten thousand, four hundred ninety-one".