31434131243 has 2 divisors, whose sum is σ = 31434131244. Its totient is φ = 31434131242.

The previous prime is 31434131237. The next prime is 31434131251. The reversal of 31434131243 is 34213143413.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (34213143413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31434131243 - 2⁴ = 31434131227 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (31434131203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15717065621 + 15717065622.

It is an arithmetic number, because the mean of its divisors is an integer number (15717065622).

Almost surely, 2^31434131243 is an apocalyptic number.

31434131243 is a deficient number, since it is larger than the sum of its proper divisors (1).

31434131243 is an equidigital number, since it uses as much as digits as its factorization.

31434131243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 29.

Adding to 31434131243 its reverse (34213143413), we get a palindrome (65647274656).

The spelling of 31434131243 in words is "thirty-one billion, four hundred thirty-four million, one hundred thirty-one thousand, two hundred forty-three".