3113181881 has 2 divisors, whose sum is σ = 3113181882. Its totient is φ = 3113181880.

The previous prime is 3113181853. The next prime is 3113181889. The reversal of 3113181881 is 1881813113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3113082025 + 99856 = 55795^2 + 316^2 .

It is a cyclic number.

It is not a de Polignac number, because 3113181881 - 2¹⁸ = 3112919737 is a prime.

It is a super-2 number, since 2×3113181881² = 19383802848373396322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3113181889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1556590940 + 1556590941.

It is an arithmetic number, because the mean of its divisors is an integer number (1556590941).

Almost surely, 2^3113181881 is an apocalyptic number.

It is an amenable number.

3113181881 is a deficient number, since it is larger than the sum of its proper divisors (1).

3113181881 is an equidigital number, since it uses as much as digits as its factorization.

3113181881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 35.

The square root of 3113181881 is about 55795.8948400328. The cubic root of 3113181881 is about 1460.1635334741.

Adding to 3113181881 its reverse (1881813113), we get a palindrome (4994994994).

The spelling of 3113181881 in words is "three billion, one hundred thirteen million, one hundred eighty-one thousand, eight hundred eighty-one".