328051621 has 8 divisors (see below), whose sum is σ = 331703424. Its totient is φ = 324410880.

The previous prime is 328051519. The next prime is 328051637. The reversal of 328051621 is 126150823.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-328051621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 328051621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328051421) 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, 66196 + ... + 70978.

It is an arithmetic number, because the mean of its divisors is an integer number (41462928).

Almost surely, 2^328051621 is an apocalyptic number.

It is an amenable number.

328051621 is a deficient number, since it is larger than the sum of its proper divisors (3651803).

328051621 is a wasteful number, since it uses less digits than its factorization.

328051621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5531.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 328051621 is about 18112.1953666583. The cubic root of 328051621 is about 689.6796251263.

The spelling of 328051621 in words is "three hundred twenty-eight million, fifty-one thousand, six hundred twenty-one".