3841966221 has 16 divisors (see below), whose sum is σ = 5439343104. Its totient is φ = 2403805184.

The previous prime is 3841966217. The next prime is 3841966241. The reversal of 3841966221 is 1226691483.

It is a cyclic number.

It is not a de Polignac number, because 3841966221 - 2² = 3841966217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3841966241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88701 + ... + 124706.

It is an arithmetic number, because the mean of its divisors is an integer number (339958944).

Almost surely, 2^3841966221 is an apocalyptic number.

It is an amenable number.

3841966221 is a deficient number, since it is larger than the sum of its proper divisors (1597376883).

3841966221 is a wasteful number, since it uses less digits than its factorization.

3841966221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213780.

The product of its digits is 124416, while the sum is 42.

The square root of 3841966221 is about 61983.5963864634. The cubic root of 3841966221 is about 1566.2142849933.

The spelling of 3841966221 in words is "three billion, eight hundred forty-one million, nine hundred sixty-six thousand, two hundred twenty-one".