31123431607 has 2 divisors, whose sum is σ = 31123431608. Its totient is φ = 31123431606.

The previous prime is 31123431601. The next prime is 31123431653. The reversal of 31123431607 is 70613432113.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31123431607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31123431601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15561715803 + 15561715804.

It is an arithmetic number, because the mean of its divisors is an integer number (15561715804).

Almost surely, 2^31123431607 is an apocalyptic number.

31123431607 is a deficient number, since it is larger than the sum of its proper divisors (1).

31123431607 is an equidigital number, since it uses as much as digits as its factorization.

31123431607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 31.

The spelling of 31123431607 in words is "thirty-one billion, one hundred twenty-three million, four hundred thirty-one thousand, six hundred seven".