31123432103 has 2 divisors, whose sum is σ = 31123432104. Its totient is φ = 31123432102.

The previous prime is 31123432061. The next prime is 31123432177. The reversal of 31123432103 is 30123432113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31123432103 - 2¹⁶ = 31123366567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31123432603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15561716051 + 15561716052.

It is an arithmetic number, because the mean of its divisors is an integer number (15561716052).

Almost surely, 2^31123432103 is an apocalyptic number.

31123432103 is a deficient number, since it is larger than the sum of its proper divisors (1).

31123432103 is an equidigital number, since it uses as much as digits as its factorization.

31123432103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31123432103 its reverse (30123432113), we get a palindrome (61246864216).

The spelling of 31123432103 in words is "thirty-one billion, one hundred twenty-three million, four hundred thirty-two thousand, one hundred three".