352321921 has 12 divisors (see below), whose sum is σ = 424964352. Its totient is φ = 286093944.

The previous prime is 352321873. The next prime is 352321961. The reversal of 352321921 is 129123253.

It is not a de Polignac number, because 352321921 - 2¹¹ = 352319873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 352321921.

It is not an unprimeable number, because it can be changed into a prime (352321961) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67185 + ... + 72238.

It is an arithmetic number, because the mean of its divisors is an integer number (35413696).

Almost surely, 2^352321921 is an apocalyptic number.

It is an amenable number.

352321921 is a deficient number, since it is larger than the sum of its proper divisors (72642431).

352321921 is a wasteful number, since it uses less digits than its factorization.

352321921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139468 (or 139449 counting only the distinct ones).

The product of its digits is 3240, while the sum is 28.

The square root of 352321921 is about 18770.2403021378. The cubic root of 352321921 is about 706.2848464181.

The spelling of 352321921 in words is "three hundred fifty-two million, three hundred twenty-one thousand, nine hundred twenty-one".