352132721 has 2 divisors, whose sum is σ = 352132722. Its totient is φ = 352132720.

The previous prime is 352132699. The next prime is 352132727. The reversal of 352132721 is 127231253.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242113600 + 110019121 = 15560^2 + 10489^2 .

It is an emirp because it is prime and its reverse (127231253) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 352132721 - 2¹⁴ = 352116337 is a prime.

It is not a weakly prime, because it can be changed into another prime (352132727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176066360 + 176066361.

It is an arithmetic number, because the mean of its divisors is an integer number (176066361).

Almost surely, 2^352132721 is an apocalyptic number.

It is an amenable number.

352132721 is a deficient number, since it is larger than the sum of its proper divisors (1).

352132721 is an equidigital number, since it uses as much as digits as its factorization.

352132721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 26.

The square root of 352132721 is about 18765.1997324835. The cubic root of 352132721 is about 706.1583967025.

Adding to 352132721 its reverse (127231253), we get a palindrome (479363974).

The spelling of 352132721 in words is "three hundred fifty-two million, one hundred thirty-two thousand, seven hundred twenty-one".