3211042561 has 2 divisors, whose sum is σ = 3211042562. Its totient is φ = 3211042560.

The previous prime is 3211042559. The next prime is 3211042591. The reversal of 3211042561 is 1652401123.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3125369025 + 85673536 = 55905^2 + 9256^2 .

It is a cyclic number.

It is not a de Polignac number, because 3211042561 - 2¹ = 3211042559 is a prime.

Together with 3211042559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3211042591) 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, 1605521280 + 1605521281.

It is an arithmetic number, because the mean of its divisors is an integer number (1605521281).

Almost surely, 2^3211042561 is an apocalyptic number.

It is an amenable number.

3211042561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3211042561 is an equidigital number, since it uses as much as digits as its factorization.

3211042561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 3211042561 is about 56666.0618095170. The cubic root of 3211042561 is about 1475.3057010348.

Adding to 3211042561 its reverse (1652401123), we get a palindrome (4863443684).

The spelling of 3211042561 in words is "three billion, two hundred eleven million, forty-two thousand, five hundred sixty-one".