352220681 has 2 divisors, whose sum is σ = 352220682. Its totient is φ = 352220680.

The previous prime is 352220641. The next prime is 352220683. The reversal of 352220681 is 186022253.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 340033600 + 12187081 = 18440^2 + 3491^2 .

It is an emirp because it is prime and its reverse (186022253) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 352220681 - 2¹⁴ = 352204297 is a prime.

It is a super-2 number, since 2×352220681² = 248118816248207522, which contains 22 as substring.

Together with 352220683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (352220683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176110340 + 176110341.

It is an arithmetic number, because the mean of its divisors is an integer number (176110341).

Almost surely, 2^352220681 is an apocalyptic number.

It is an amenable number.

352220681 is a deficient number, since it is larger than the sum of its proper divisors (1).

352220681 is an equidigital number, since it uses as much as digits as its factorization.

352220681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 352220681 is about 18767.5432862162. The cubic root of 352220681 is about 706.2171894226.

The spelling of 352220681 in words is "three hundred fifty-two million, two hundred twenty thousand, six hundred eighty-one".