3155305561 has 2 divisors, whose sum is σ = 3155305562. Its totient is φ = 3155305560.

The previous prime is 3155305541. The next prime is 3155305591. The reversal of 3155305561 is 1655035513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3138240400 + 17065161 = 56020^2 + 4131^2 .

It is a cyclic number.

It is not a de Polignac number, because 3155305561 - 2¹⁷ = 3155174489 is a prime.

It is a super-3 number, since 3×3155305561³ (a number of 29 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (3155305541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1577652780 + 1577652781.

It is an arithmetic number, because the mean of its divisors is an integer number (1577652781).

Almost surely, 2^3155305561 is an apocalyptic number.

It is an amenable number.

3155305561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3155305561 is an equidigital number, since it uses as much as digits as its factorization.

3155305561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33750, while the sum is 34.

The square root of 3155305561 is about 56172.1066099537. The cubic root of 3155305561 is about 1466.7197532839.

The spelling of 3155305561 in words is "three billion, one hundred fifty-five million, three hundred five thousand, five hundred sixty-one".