3213443661 has 8 divisors (see below), whose sum is σ = 4288893024. Its totient is φ = 2140145040.

The previous prime is 3213443657. The next prime is 3213443677. The reversal of 3213443661 is 1663443123.

3213443661 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3213443661 - 2² = 3213443657 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3213543661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 534195 + ... + 540176.

It is an arithmetic number, because the mean of its divisors is an integer number (536111628).

Almost surely, 2^3213443661 is an apocalyptic number.

It is an amenable number.

3213443661 is a deficient number, since it is larger than the sum of its proper divisors (1075449363).

3213443661 is a wasteful number, since it uses less digits than its factorization.

3213443661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075371.

The product of its digits is 31104, while the sum is 33.

The square root of 3213443661 is about 56687.2442530063. The cubic root of 3213443661 is about 1475.6733359353.

Adding to 3213443661 its reverse (1663443123), we get a palindrome (4876886784).

The spelling of 3213443661 in words is "three billion, two hundred thirteen million, four hundred forty-three thousand, six hundred sixty-one".