31143103 has 2 divisors, whose sum is σ = 31143104. Its totient is φ = 31143102.

The previous prime is 31143083. The next prime is 31143113. The reversal of 31143103 is 30134113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31143103 - 2⁹ = 31142591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31143113) 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, 15571551 + 15571552.

It is an arithmetic number, because the mean of its divisors is an integer number (15571552).

Almost surely, 2^31143103 is an apocalyptic number.

31143103 is a deficient number, since it is larger than the sum of its proper divisors (1).

31143103 is an equidigital number, since it uses as much as digits as its factorization.

31143103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 31143103 is about 5580.6005949181. The cubic root of 31143103 is about 314.6207007622.

Adding to 31143103 its reverse (30134113), we get a palindrome (61277216).

The spelling of 31143103 in words is "thirty-one million, one hundred forty-three thousand, one hundred three".