31031013103 has 2 divisors, whose sum is σ = 31031013104. Its totient is φ = 31031013102.

The previous prime is 31031013071. The next prime is 31031013131. The reversal of 31031013103 is 30131013013.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31031013103 - 2⁵ = 31031013071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31031013163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15515506551 + 15515506552.

It is an arithmetic number, because the mean of its divisors is an integer number (15515506552).

Almost surely, 2^31031013103 is an apocalyptic number.

31031013103 is a deficient number, since it is larger than the sum of its proper divisors (1).

31031013103 is an equidigital number, since it uses as much as digits as its factorization.

31031013103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 16.

Adding to 31031013103 its reverse (30131013013), we get a palindrome (61162026116).

The spelling of 31031013103 in words is "thirty-one billion, thirty-one million, thirteen thousand, one hundred three".