3821752221 has 8 divisors (see below), whose sum is σ = 5823622464. Its totient is φ = 2183858400.

The previous prime is 3821752183. The next prime is 3821752267. The reversal of 3821752221 is 1222571283.

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

It is not a de Polignac number, because 3821752221 - 2⁶ = 3821752157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3821752621) 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, 90994080 + ... + 90994121.

It is an arithmetic number, because the mean of its divisors is an integer number (727952808).

Almost surely, 2^3821752221 is an apocalyptic number.

It is an amenable number.

3821752221 is a deficient number, since it is larger than the sum of its proper divisors (2001870243).

3821752221 is a wasteful number, since it uses less digits than its factorization.

3821752221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181988211.

The product of its digits is 13440, while the sum is 33.

The square root of 3821752221 is about 61820.3220713060. The cubic root of 3821752221 is about 1563.4626433754.

The spelling of 3821752221 in words is "three billion, eight hundred twenty-one million, seven hundred fifty-two thousand, two hundred twenty-one".