31321637343 has 12 divisors (see below), whose sum is σ = 46465132168. Its totient is φ = 20316737520.

The previous prime is 31321637341. The next prime is 31321637357. The reversal of 31321637343 is 34373612313.

31321637343 is a `hidden beast` number, since 3 + 13 + 2 + 1 + 637 + 3 + 4 + 3 = 666.

It is not a de Polignac number, because 31321637343 - 2¹ = 31321637341 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31321637298 and 31321637307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321637341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47029153 + ... + 47029818.

Almost surely, 2^31321637343 is an apocalyptic number.

31321637343 is a deficient number, since it is larger than the sum of its proper divisors (15143494825).

31321637343 is a wasteful number, since it uses less digits than its factorization.

31321637343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94059014 (or 94059011 counting only the distinct ones).

The product of its digits is 81648, while the sum is 36.

The spelling of 31321637343 in words is "thirty-one billion, three hundred twenty-one million, six hundred thirty-seven thousand, three hundred forty-three".