31555345443 has 16 divisors (see below), whose sum is σ = 44059355136. Its totient is φ = 20050627520.

The previous prime is 31555345441. The next prime is 31555345457. The reversal of 31555345443 is 34454355513.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 31555345443 - 2¹ = 31555345441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31555345395 and 31555345404.

It is not an unprimeable number, because it can be changed into a prime (31555345441) 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, 794355 + ... + 833132.

It is an arithmetic number, because the mean of its divisors is an integer number (2753709696).

Almost surely, 2^31555345443 is an apocalyptic number.

31555345443 is a deficient number, since it is larger than the sum of its proper divisors (12504009693).

31555345443 is a wasteful number, since it uses less digits than its factorization.

31555345443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627794.

The product of its digits is 1080000, while the sum is 42.

The spelling of 31555345443 in words is "thirty-one billion, five hundred fifty-five million, three hundred forty-five thousand, four hundred forty-three".