31390522543 has 2 divisors, whose sum is σ = 31390522544. Its totient is φ = 31390522542.

The previous prime is 31390522523. The next prime is 31390522633. The reversal of 31390522543 is 34522509313.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31390522543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31390522523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15695261271 + 15695261272.

It is an arithmetic number, because the mean of its divisors is an integer number (15695261272).

Almost surely, 2^31390522543 is an apocalyptic number.

31390522543 is a deficient number, since it is larger than the sum of its proper divisors (1).

31390522543 is an equidigital number, since it uses as much as digits as its factorization.

31390522543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 37.

The spelling of 31390522543 in words is "thirty-one billion, three hundred ninety million, five hundred twenty-two thousand, five hundred forty-three".