31368243345 has 16 divisors (see below), whose sum is σ = 53141495040. Its totient is φ = 15745627904.

The previous prime is 31368243323. The next prime is 31368243349. The reversal of 31368243345 is 54334286313.

It is a cyclic number.

It is not a de Polignac number, because 31368243345 - 2¹⁷ = 31368112273 is a prime.

It is a super-2 number, since 2×31368243345² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 31368243297 and 31368243306.

It is not an unprimeable number, because it can be changed into a prime (31368243349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61506105 + ... + 61506614.

It is an arithmetic number, because the mean of its divisors is an integer number (3321343440).

Almost surely, 2^31368243345 is an apocalyptic number.

It is an amenable number.

31368243345 is a deficient number, since it is larger than the sum of its proper divisors (21773251695).

31368243345 is a wasteful number, since it uses less digits than its factorization.

31368243345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123012744.

The product of its digits is 622080, while the sum is 42.

The spelling of 31368243345 in words is "thirty-one billion, three hundred sixty-eight million, two hundred forty-three thousand, three hundred forty-five".