31312230072103 has 2 divisors, whose sum is σ = 31312230072104. Its totient is φ = 31312230072102.

The previous prime is 31312230072077. The next prime is 31312230072107. The reversal of 31312230072103 is 30127003221313.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31312230072103 is a prime.

It is a super-2 number, since 2×31312230072103² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31312230072107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656115036051 + 15656115036052.

It is an arithmetic number, because the mean of its divisors is an integer number (15656115036052).

Almost surely, 2^{31312230072103} is an apocalyptic number.

31312230072103 is a deficient number, since it is larger than the sum of its proper divisors (1).

31312230072103 is an equidigital number, since it uses as much as digits as its factorization.

31312230072103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 28.

Adding to 31312230072103 its reverse (30127003221313), we get a palindrome (61439233293416).

The spelling of 31312230072103 in words is "thirty-one trillion, three hundred twelve billion, two hundred thirty million, seventy-two thousand, one hundred three".