32643251 has 2 divisors, whose sum is σ = 32643252. Its totient is φ = 32643250.

The previous prime is 32643229. The next prime is 32643307. The reversal of 32643251 is 15234623.

It is a weak prime.

It is an emirp because it is prime and its reverse (15234623) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32643251 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 32643251.

It is not a weakly prime, because it can be changed into another prime (32643851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16321625 + 16321626.

It is an arithmetic number, because the mean of its divisors is an integer number (16321626).

Almost surely, 2^32643251 is an apocalyptic number.

32643251 is a deficient number, since it is larger than the sum of its proper divisors (1).

32643251 is an equidigital number, since it uses as much as digits as its factorization.

32643251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 26.

The square root of 32643251 is about 5713.4272551596. The cubic root of 32643251 is about 319.5933995973.

Adding to 32643251 its reverse (15234623), we get a palindrome (47877874).

The spelling of 32643251 in words is "thirty-two million, six hundred forty-three thousand, two hundred fifty-one".