3311206561 has 4 divisors (see below), whose sum is σ = 3565914772. Its totient is φ = 3056498352.

The previous prime is 3311206543. The next prime is 3311206583. The reversal of 3311206561 is 1656021133.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 156250000 + 3154956561 = 12500^2 + 56169^2 .

It is a cyclic number.

It is not a de Polignac number, because 3311206561 - 2⁹ = 3311206049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3311200561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127354086 + ... + 127354111.

It is an arithmetic number, because the mean of its divisors is an integer number (891478693).

Almost surely, 2^3311206561 is an apocalyptic number.

It is an amenable number.

3311206561 is a deficient number, since it is larger than the sum of its proper divisors (254708211).

3311206561 is a wasteful number, since it uses less digits than its factorization.

3311206561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254708210.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 3311206561 is about 57543.0843890037. The cubic root of 3311206561 is about 1490.4889407791.

Adding to 3311206561 its reverse (1656021133), we get a palindrome (4967227694).

The spelling of 3311206561 in words is "three billion, three hundred eleven million, two hundred six thousand, five hundred sixty-one".