31000312043 has 2 divisors, whose sum is σ = 31000312044. Its totient is φ = 31000312042.

The previous prime is 31000311997. The next prime is 31000312061. The reversal of 31000312043 is 34021300013.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31000312043 - 2⁸ = 31000311787 is a prime.

It is a super-2 number, since 2×31000312043² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (31000312943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15500156021 + 15500156022.

It is an arithmetic number, because the mean of its divisors is an integer number (15500156022).

Almost surely, 2^31000312043 is an apocalyptic number.

31000312043 is a deficient number, since it is larger than the sum of its proper divisors (1).

31000312043 is an equidigital number, since it uses as much as digits as its factorization.

31000312043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 31000312043 its reverse (34021300013), we get a palindrome (65021612056).

The spelling of 31000312043 in words is "thirty-one billion, three hundred twelve thousand, forty-three".