31321637345 has 8 divisors (see below), whose sum is σ = 37623669864. Its totient is φ = 25032173184.

The previous prime is 31321637341. The next prime is 31321637357. The reversal of 31321637345 is 54373612313.

It can be written as a sum of positive squares in 4 ways, for example, as 8414209441 + 22907427904 = 91729^2 + 151352^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31321637345 - 2² = 31321637341 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31321637299 and 31321637308.

It is not an unprimeable number, because it can be changed into a prime (31321637341) 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 7 ways as a sum of consecutive naturals, for example, 3136604 + ... + 3146573.

It is an arithmetic number, because the mean of its divisors is an integer number (4702958733).

Almost surely, 2^31321637345 is an apocalyptic number.

It is an amenable number.

31321637345 is a deficient number, since it is larger than the sum of its proper divisors (6302032519).

31321637345 is an equidigital number, since it uses as much as digits as its factorization.

31321637345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6284179.

The product of its digits is 136080, while the sum is 38.

The spelling of 31321637345 in words is "thirty-one billion, three hundred twenty-one million, six hundred thirty-seven thousand, three hundred forty-five".