352543221 has 6 divisors (see below), whose sum is σ = 509229110. Its totient is φ = 235028808.

The previous prime is 352543211. The next prime is 352543249. The reversal of 352543221 is 122345253.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 211266225 + 141276996 = 14535^2 + 11886^2 .

It is not a de Polignac number, because 352543221 - 2⁵ = 352543189 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 (352543211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19585726 + ... + 19585743.

Almost surely, 2^352543221 is an apocalyptic number.

It is an amenable number.

352543221 is a deficient number, since it is larger than the sum of its proper divisors (156685889).

352543221 is a wasteful number, since it uses less digits than its factorization.

352543221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39171475 (or 39171472 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 352543221 is about 18776.1343465581. The cubic root of 352543221 is about 706.4326923827.

Adding to 352543221 its reverse (122345253), we get a palindrome (474888474).

The spelling of 352543221 in words is "three hundred fifty-two million, five hundred forty-three thousand, two hundred twenty-one".