3162121561 has 2 divisors, whose sum is σ = 3162121562. Its totient is φ = 3162121560.

The previous prime is 3162121553. The next prime is 3162121621. The reversal of 3162121561 is 1651212613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1924489161 + 1237632400 = 43869^2 + 35180^2 .

It is a cyclic number.

It is not a de Polignac number, because 3162121561 - 2³ = 3162121553 is a prime.

It is not a weakly prime, because it can be changed into another prime (3162121661) 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, 1581060780 + 1581060781.

It is an arithmetic number, because the mean of its divisors is an integer number (1581060781).

Almost surely, 2^3162121561 is an apocalyptic number.

It is an amenable number.

3162121561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3162121561 is an equidigital number, since it uses as much as digits as its factorization.

3162121561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 28.

The square root of 3162121561 is about 56232.7445622210. The cubic root of 3162121561 is about 1467.7751156194.

The spelling of 3162121561 in words is "three billion, one hundred sixty-two million, one hundred twenty-one thousand, five hundred sixty-one".