31124343287 has 2 divisors, whose sum is σ = 31124343288. Its totient is φ = 31124343286.

The previous prime is 31124343269. The next prime is 31124343331. The reversal of 31124343287 is 78234342113.

It is a weak prime.

It is an emirp because it is prime and its reverse (78234342113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31124343287 - 2⁸ = 31124343031 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31124343287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31124343587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15562171643 + 15562171644.

It is an arithmetic number, because the mean of its divisors is an integer number (15562171644).

Almost surely, 2^31124343287 is an apocalyptic number.

31124343287 is a deficient number, since it is larger than the sum of its proper divisors (1).

31124343287 is an equidigital number, since it uses as much as digits as its factorization.

31124343287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 38.

The spelling of 31124343287 in words is "thirty-one billion, one hundred twenty-four million, three hundred forty-three thousand, two hundred eighty-seven".