31426474243 has 2 divisors, whose sum is σ = 31426474244. Its totient is φ = 31426474242.

The previous prime is 31426474241. The next prime is 31426474267. The reversal of 31426474243 is 34247462413.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (34247462413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31426474243 - 2¹ = 31426474241 is a prime.

Together with 31426474241, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 31426474196 and 31426474205.

It is not a weakly prime, because it can be changed into another prime (31426474241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15713237121 + 15713237122.

It is an arithmetic number, because the mean of its divisors is an integer number (15713237122).

Almost surely, 2^31426474243 is an apocalyptic number.

31426474243 is a deficient number, since it is larger than the sum of its proper divisors (1).

31426474243 is an equidigital number, since it uses as much as digits as its factorization.

31426474243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 40.

The spelling of 31426474243 in words is "thirty-one billion, four hundred twenty-six million, four hundred seventy-four thousand, two hundred forty-three".