31450043 has 2 divisors, whose sum is σ = 31450044. Its totient is φ = 31450042.

The previous prime is 31450033. The next prime is 31450057. The reversal of 31450043 is 34005413.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31450043 - 2¹⁸ = 31187899 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31449997 and 31450024.

It is not a weakly prime, because it can be changed into another prime (31450033) 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, 15725021 + 15725022.

It is an arithmetic number, because the mean of its divisors is an integer number (15725022).

Almost surely, 2^31450043 is an apocalyptic number.

31450043 is a deficient number, since it is larger than the sum of its proper divisors (1).

31450043 is an equidigital number, since it uses as much as digits as its factorization.

31450043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 31450043 is about 5608.0337909110. The cubic root of 31450043 is about 315.6509357898.

Adding to 31450043 its reverse (34005413), we get a palindrome (65455456).

The spelling of 31450043 in words is "thirty-one million, four hundred fifty thousand, forty-three".