3959548221 has 8 divisors (see below), whose sum is σ = 5379009120. Its totient is φ = 2589893072.

The previous prime is 3959548207. The next prime is 3959548249. The reversal of 3959548221 is 1228459593.

It is a happy number.

3959548221 is digitally balanced in base 2, because in such base 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 a cyclic number.

It is not a de Polignac number, because 3959548221 - 2⁵ = 3959548189 is a prime.

It is a super-2 number, since 2×3959548221² = 31356044228848529682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3959548261) 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, 12451251 + ... + 12451568.

It is an arithmetic number, because the mean of its divisors is an integer number (672376140).

Almost surely, 2^3959548221 is an apocalyptic number.

It is an amenable number.

3959548221 is a deficient number, since it is larger than the sum of its proper divisors (1419460899).

3959548221 is a wasteful number, since it uses less digits than its factorization.

3959548221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24902875.

The product of its digits is 777600, while the sum is 48.

The square root of 3959548221 is about 62924.9411680297. The cubic root of 3959548221 is about 1582.0318117642.

The spelling of 3959548221 in words is "three billion, nine hundred fifty-nine million, five hundred forty-eight thousand, two hundred twenty-one".