2131223317 has 2 divisors, whose sum is σ = 2131223318. Its totient is φ = 2131223316.

The previous prime is 2131223291. The next prime is 2131223327. The reversal of 2131223317 is 7133221312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1142372401 + 988850916 = 33799^2 + 31446^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131223317 - 2⁷ = 2131223189 is a prime.

It is a super-2 number, since 2×2131223317² = 9084225653848964978, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2131223291 and 2131223300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131223327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065611658 + 1065611659.

It is an arithmetic number, because the mean of its divisors is an integer number (1065611659).

Almost surely, 2^2131223317 is an apocalyptic number.

It is an amenable number.

2131223317 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131223317 is an equidigital number, since it uses as much as digits as its factorization.

2131223317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 25.

The square root of 2131223317 is about 46165.1742875514. The cubic root of 2131223317 is about 1286.8946231441.

Adding to 2131223317 its reverse (7133221312), we get a palindrome (9264444629).

The spelling of 2131223317 in words is "two billion, one hundred thirty-one million, two hundred twenty-three thousand, three hundred seventeen".