31556291343 has 16 divisors (see below), whose sum is σ = 43312082016. Its totient is φ = 20421642240.

The previous prime is 31556291339. The next prime is 31556291353. The reversal of 31556291343 is 34319265513.

It is not a de Polignac number, because 31556291343 - 2² = 31556291339 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31556291295 and 31556291304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31556291353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 280218 + ... + 376343.

It is an arithmetic number, because the mean of its divisors is an integer number (2707005126).

Almost surely, 2^31556291343 is an apocalyptic number.

31556291343 is a deficient number, since it is larger than the sum of its proper divisors (11755790673).

31556291343 is a wasteful number, since it uses less digits than its factorization.

31556291343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657034.

The product of its digits is 291600, while the sum is 42.

The spelling of 31556291343 in words is "thirty-one billion, five hundred fifty-six million, two hundred ninety-one thousand, three hundred forty-three".