40312330031 has 2 divisors, whose sum is σ = 40312330032. Its totient is φ = 40312330030.

The previous prime is 40312329991. The next prime is 40312330109. The reversal of 40312330031 is 13003321304.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40312330031 is a prime.

It is a super-2 number, since 2×40312330031² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 40312329985 and 40312330012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40312330931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20156165015 + 20156165016.

It is an arithmetic number, because the mean of its divisors is an integer number (20156165016).

Almost surely, 2^40312330031 is an apocalyptic number.

40312330031 is a deficient number, since it is larger than the sum of its proper divisors (1).

40312330031 is an equidigital number, since it uses as much as digits as its factorization.

40312330031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 40312330031 its reverse (13003321304), we get a palindrome (53315651335).

The spelling of 40312330031 in words is "forty billion, three hundred twelve million, three hundred thirty thousand, thirty-one".