3111052561 has 2 divisors, whose sum is σ = 3111052562. Its totient is φ = 3111052560.

The previous prime is 3111052543. The next prime is 3111052577. The reversal of 3111052561 is 1652501113.

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., 3062958336 + 48094225 = 55344^2 + 6935^2 .

It is a cyclic number.

It is not a de Polignac number, because 3111052561 - 2⁷ = 3111052433 is a prime.

It is not a weakly prime, because it can be changed into another prime (3111002561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1555526280 + 1555526281.

It is an arithmetic number, because the mean of its divisors is an integer number (1555526281).

Almost surely, 2^3111052561 is an apocalyptic number.

It is an amenable number.

3111052561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3111052561 is an equidigital number, since it uses as much as digits as its factorization.

3111052561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 3111052561 is about 55776.8102440432. The cubic root of 3111052561 is about 1459.8305553338.

Adding to 3111052561 its reverse (1652501113), we get a palindrome (4763553674).

The spelling of 3111052561 in words is "three billion, one hundred eleven million, fifty-two thousand, five hundred sixty-one".