2317811381 has 2 divisors, whose sum is σ = 2317811382. Its totient is φ = 2317811380.

The previous prime is 2317811351. The next prime is 2317811383. The reversal of 2317811381 is 1831187132.

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., 2226990481 + 90820900 = 47191^2 + 9530^2 .

It is a cyclic number.

It is not a de Polignac number, because 2317811381 - 2³⁰ = 1244069557 is a prime.

It is a super-2 number, since 2×2317811381² = 10744499195786254322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 2317811383, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2317811383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1158905690 + 1158905691.

It is an arithmetic number, because the mean of its divisors is an integer number (1158905691).

Almost surely, 2^2317811381 is an apocalyptic number.

It is an amenable number.

2317811381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2317811381 is an equidigital number, since it uses as much as digits as its factorization.

2317811381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 35.

The square root of 2317811381 is about 48143.6535900631. The cubic root of 2317811381 is about 1323.4047741205.

The spelling of 2317811381 in words is "two billion, three hundred seventeen million, eight hundred eleven thousand, three hundred eighty-one".