3225121681 has 2 divisors, whose sum is σ = 3225121682. Its totient is φ = 3225121680.

The previous prime is 3225121649. The next prime is 3225121721. The reversal of 3225121681 is 1861215223.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3160238656 + 64883025 = 56216^2 + 8055^2 .

It is a cyclic number.

It is not a de Polignac number, because 3225121681 - 2⁵ = 3225121649 is a prime.

It is a super-2 number, since 2×3225121681² = 20802819714512531522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3225121381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1612560840 + 1612560841.

It is an arithmetic number, because the mean of its divisors is an integer number (1612560841).

Almost surely, 2^3225121681 is an apocalyptic number.

It is an amenable number.

3225121681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3225121681 is an equidigital number, since it uses as much as digits as its factorization.

3225121681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 31.

The square root of 3225121681 is about 56790.1547893647. The cubic root of 3225121681 is about 1477.4587631487.

The spelling of 3225121681 in words is "three billion, two hundred twenty-five million, one hundred twenty-one thousand, six hundred eighty-one".