3043521661 has 4 divisors (see below), whose sum is σ = 3100946652. Its totient is φ = 2986096672.

The previous prime is 3043521647. The next prime is 3043521709. The reversal of 3043521661 is 1661253403.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1661253403 = 15307 ⋅108529.

It can be written as a sum of positive squares in 2 ways, for example, as 1510799161 + 1532722500 = 38869^2 + 39150^2 .

It is a cyclic number.

It is not a de Polignac number, because 3043521661 - 2⁵ = 3043521629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3043521641) 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, 28712416 + ... + 28712521.

It is an arithmetic number, because the mean of its divisors is an integer number (775236663).

Almost surely, 2^3043521661 is an apocalyptic number.

It is an amenable number.

3043521661 is a deficient number, since it is larger than the sum of its proper divisors (57424991).

3043521661 is an equidigital number, since it uses as much as digits as its factorization.

3043521661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57424990.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 3043521661 is about 55168.1217824207. The cubic root of 3043521661 is about 1449.1904575059.

The spelling of 3043521661 in words is "three billion, forty-three million, five hundred twenty-one thousand, six hundred sixty-one".