31322616220345 has 8 divisors (see below), whose sum is σ = 37861498147464. Its totient is φ = 24875187187584.

The previous prime is 31322616220333. The next prime is 31322616220409. The reversal of 31322616220345 is 54302261622313.

It can be written as a sum of positive squares in 4 ways, for example, as 11283492346281 + 20039123874064 = 3359091^2 + 4476508^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31322616220345 is a prime.

It is a super-2 number, since 2×31322616220345² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31322616220298 and 31322616220307.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22863222834 + ... + 22863224203.

It is an arithmetic number, because the mean of its divisors is an integer number (4732687268433).

Almost surely, 2^{31322616220345} is an apocalyptic number.

It is an amenable number.

31322616220345 is a deficient number, since it is larger than the sum of its proper divisors (6538881927119).

31322616220345 is a wasteful number, since it uses less digits than its factorization.

31322616220345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45726447179.

The product of its (nonzero) digits is 311040, while the sum is 40.

Adding to 31322616220345 its reverse (54302261622313), we get a palindrome (85624877842658).

The spelling of 31322616220345 in words is "thirty-one trillion, three hundred twenty-two billion, six hundred sixteen million, two hundred twenty thousand, three hundred forty-five".