31318043 has 2 divisors, whose sum is σ = 31318044. Its totient is φ = 31318042.

The previous prime is 31318037. The next prime is 31318051. The reversal of 31318043 is 34081313.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31318043 - 2²⁰ = 30269467 is a prime.

It is not a weakly prime, because it can be changed into another prime (31318003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15659021 + 15659022.

It is an arithmetic number, because the mean of its divisors is an integer number (15659022).

Almost surely, 2^31318043 is an apocalyptic number.

31318043 is a deficient number, since it is larger than the sum of its proper divisors (1).

31318043 is an equidigital number, since it uses as much as digits as its factorization.

31318043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 31318043 is about 5596.2525854361. The cubic root of 31318043 is about 315.2087069054.

Adding to 31318043 its reverse (34081313), we get a palindrome (65399356).

The spelling of 31318043 in words is "thirty-one million, three hundred eighteen thousand, forty-three".