3112145581 has 2 divisors, whose sum is σ = 3112145582. Its totient is φ = 3112145580.

The previous prime is 3112145557. The next prime is 3112145587. The reversal of 3112145581 is 1855412113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1947015625 + 1165129956 = 44125^2 + 34134^2 .

It is a cyclic number.

It is not a de Polignac number, because 3112145581 - 2⁷ = 3112145453 is a prime.

It is a super-2 number, since 2×3112145581² = 19370900234675655122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3112145587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1556072790 + 1556072791.

It is an arithmetic number, because the mean of its divisors is an integer number (1556072791).

Almost surely, 2^3112145581 is an apocalyptic number.

It is an amenable number.

3112145581 is a deficient number, since it is larger than the sum of its proper divisors (1).

3112145581 is an equidigital number, since it uses as much as digits as its factorization.

3112145581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4800, while the sum is 31.

The square root of 3112145581 is about 55786.6075415955. The cubic root of 3112145581 is about 1460.0014982470.

Adding to 3112145581 its reverse (1855412113), we get a palindrome (4967557694).

The spelling of 3112145581 in words is "three billion, one hundred twelve million, one hundred forty-five thousand, five hundred eighty-one".