3443661221 has 32 divisors (see below), whose sum is σ = 4644691968. Its totient is φ = 2465691840.

The previous prime is 3443661211. The next prime is 3443661229. The reversal of 3443661221 is 1221663443.

It is a cyclic number.

It is not a de Polignac number, because 3443661221 - 2⁶ = 3443661157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3443661229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 215510 + ... + 230936.

It is an arithmetic number, because the mean of its divisors is an integer number (145146624).

Almost surely, 2^3443661221 is an apocalyptic number.

It is an amenable number.

3443661221 is a deficient number, since it is larger than the sum of its proper divisors (1201030747).

3443661221 is a wasteful number, since it uses less digits than its factorization.

3443661221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15681.

The product of its digits is 20736, while the sum is 32.

The square root of 3443661221 is about 58682.7165441410. The cubic root of 3443661221 is about 1510.1038217871.

The spelling of 3443661221 in words is "three billion, four hundred forty-three million, six hundred sixty-one thousand, two hundred twenty-one".