31361613322543 has 32 divisors (see below), whose sum is σ = 38195101736064. Its totient is φ = 25137366515712.

The previous prime is 31361613322541. The next prime is 31361613322547. The reversal of 31361613322543 is 34522331616313.

It is a cyclic number.

It is not a de Polignac number, because 31361613322543 - 2¹ = 31361613322541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31361613322543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31361613322541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10288321 + ... + 12983557.

It is an arithmetic number, because the mean of its divisors is an integer number (1193596929252).

Almost surely, 2^{31361613322543} is an apocalyptic number.

31361613322543 is a deficient number, since it is larger than the sum of its proper divisors (6833488413521).

31361613322543 is a wasteful number, since it uses less digits than its factorization.

31361613322543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2695891.

The product of its digits is 699840, while the sum is 43.

Adding to 31361613322543 its reverse (34522331616313), we get a palindrome (65883944938856).

The spelling of 31361613322543 in words is "thirty-one trillion, three hundred sixty-one billion, six hundred thirteen million, three hundred twenty-two thousand, five hundred forty-three".