3155328221 has 8 divisors (see below), whose sum is σ = 3223297920. Its totient is φ = 3087393408.

The previous prime is 3155328179. The next prime is 3155328223. The reversal of 3155328221 is 1228235513.

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 3155328221 - 2¹⁴ = 3155311837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3155328223) 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, 265805 + ... + 277421.

It is an arithmetic number, because the mean of its divisors is an integer number (402912240).

Almost surely, 2^3155328221 is an apocalyptic number.

It is an amenable number.

3155328221 is a deficient number, since it is larger than the sum of its proper divisors (67969699).

3155328221 is a wasteful number, since it uses less digits than its factorization.

3155328221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17443.

The product of its digits is 14400, while the sum is 32.

The square root of 3155328221 is about 56172.3083111243. The cubic root of 3155328221 is about 1466.7232643850.

The spelling of 3155328221 in words is "three billion, one hundred fifty-five million, three hundred twenty-eight thousand, two hundred twenty-one".