31440231423103 has 2 divisors, whose sum is σ = 31440231423104. Its totient is φ = 31440231423102.

The previous prime is 31440231423067. The next prime is 31440231423157. The reversal of 31440231423103 is 30132413204413.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31440231423103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31440231423193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15720115711551 + 15720115711552.

It is an arithmetic number, because the mean of its divisors is an integer number (15720115711552).

Almost surely, 2^{31440231423103} is an apocalyptic number.

31440231423103 is a deficient number, since it is larger than the sum of its proper divisors (1).

31440231423103 is an equidigital number, since it uses as much as digits as its factorization.

31440231423103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 31440231423103 its reverse (30132413204413), we get a palindrome (61572644627516).

The spelling of 31440231423103 in words is "thirty-one trillion, four hundred forty billion, two hundred thirty-one million, four hundred twenty-three thousand, one hundred three".