31430323 has 2 divisors, whose sum is σ = 31430324. Its totient is φ = 31430322.

The previous prime is 31430293. The next prime is 31430339. The reversal of 31430323 is 32303413.

It is a strong prime.

It is an emirp because it is prime and its reverse (32303413) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31430323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31430323.

It is not a weakly prime, because it can be changed into another prime (31430363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15715161 + 15715162.

It is an arithmetic number, because the mean of its divisors is an integer number (15715162).

Almost surely, 2^31430323 is an apocalyptic number.

31430323 is a deficient number, since it is larger than the sum of its proper divisors (1).

31430323 is an equidigital number, since it uses as much as digits as its factorization.

31430323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 31430323 is about 5606.2753232427. The cubic root of 31430323 is about 315.5849481969.

Adding to 31430323 its reverse (32303413), we get a palindrome (63733736).

The spelling of 31430323 in words is "thirty-one million, four hundred thirty thousand, three hundred twenty-three".