31155223512103 has 2 divisors, whose sum is σ = 31155223512104. Its totient is φ = 31155223512102.

The previous prime is 31155223512053. The next prime is 31155223512109. The reversal of 31155223512103 is 30121532255113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31155223512103 - 2⁹ = 31155223511591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31155223512109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15577611756051 + 15577611756052.

It is an arithmetic number, because the mean of its divisors is an integer number (15577611756052).

Almost surely, 2^{31155223512103} is an apocalyptic number.

31155223512103 is a deficient number, since it is larger than the sum of its proper divisors (1).

31155223512103 is an equidigital number, since it uses as much as digits as its factorization.

31155223512103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 34.

Adding to 31155223512103 its reverse (30121532255113), we get a palindrome (61276755767216).

The spelling of 31155223512103 in words is "thirty-one trillion, one hundred fifty-five billion, two hundred twenty-three million, five hundred twelve thousand, one hundred three".