22131311317 has 2 divisors, whose sum is σ = 22131311318. Its totient is φ = 22131311316.

The previous prime is 22131311309. The next prime is 22131311333. The reversal of 22131311317 is 71311313122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16015914916 + 6115396401 = 126554^2 + 78201^2 .

It is a cyclic number.

It is not a de Polignac number, because 22131311317 - 2³ = 22131311309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22131311291 and 22131311300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22131311357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11065655658 + 11065655659.

It is an arithmetic number, because the mean of its divisors is an integer number (11065655659).

Almost surely, 2^22131311317 is an apocalyptic number.

It is an amenable number.

22131311317 is a deficient number, since it is larger than the sum of its proper divisors (1).

22131311317 is an equidigital number, since it uses as much as digits as its factorization.

22131311317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 25.

Adding to 22131311317 its reverse (71311313122), we get a palindrome (93442624439).

The spelling of 22131311317 in words is "twenty-two billion, one hundred thirty-one million, three hundred eleven thousand, three hundred seventeen".