31111040423 has 2 divisors, whose sum is σ = 31111040424. Its totient is φ = 31111040422.

The previous prime is 31111040393. The next prime is 31111040437. The reversal of 31111040423 is 32404011113.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31111040423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31111040395 and 31111040404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31111040473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15555520211 + 15555520212.

It is an arithmetic number, because the mean of its divisors is an integer number (15555520212).

Almost surely, 2^31111040423 is an apocalyptic number.

31111040423 is a deficient number, since it is larger than the sum of its proper divisors (1).

31111040423 is an equidigital number, since it uses as much as digits as its factorization.

31111040423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31111040423 its reverse (32404011113), we get a palindrome (63515051536).

The spelling of 31111040423 in words is "thirty-one billion, one hundred eleven million, forty thousand, four hundred twenty-three".