31378461143 has 2 divisors, whose sum is σ = 31378461144. Its totient is φ = 31378461142.

The previous prime is 31378461089. The next prime is 31378461181. The reversal of 31378461143 is 34116487313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31378461143 - 2¹⁴ = 31378444759 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31378461143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31378461193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15689230571 + 15689230572.

It is an arithmetic number, because the mean of its divisors is an integer number (15689230572).

Almost surely, 2^31378461143 is an apocalyptic number.

31378461143 is a deficient number, since it is larger than the sum of its proper divisors (1).

31378461143 is an equidigital number, since it uses as much as digits as its factorization.

31378461143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The spelling of 31378461143 in words is "thirty-one billion, three hundred seventy-eight million, four hundred sixty-one thousand, one hundred forty-three".