352220643 has 20 divisors (see below), whose sum is σ = 549036048. Its totient is φ = 224603280.

The previous prime is 352220641. The next prime is 352220681. The reversal of 352220643 is 346022253.

It is not a de Polignac number, because 352220643 - 2¹ = 352220641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (352220641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 92668 + ... + 96393.

Almost surely, 2^352220643 is an apocalyptic number.

352220643 is a deficient number, since it is larger than the sum of its proper divisors (196815405).

352220643 is a wasteful number, since it uses less digits than its factorization.

352220643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189096 (or 189087 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 352220643 is about 18767.5422738301. The cubic root of 352220643 is about 706.2171640254.

Adding to 352220643 its reverse (346022253), we get a palindrome (698242896).

The spelling of 352220643 in words is "three hundred fifty-two million, two hundred twenty thousand, six hundred forty-three".