32228509 has 2 divisors, whose sum is σ = 32228510. Its totient is φ = 32228508.

The previous prime is 32228479. The next prime is 32228513. The reversal of 32228509 is 90582223.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21483225 + 10745284 = 4635^2 + 3278^2 .

It is an emirp because it is prime and its reverse (90582223) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32228509 - 2⁷ = 32228381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32228519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16114254 + 16114255.

It is an arithmetic number, because the mean of its divisors is an integer number (16114255).

Almost surely, 2^32228509 is an apocalyptic number.

It is an amenable number.

32228509 is a deficient number, since it is larger than the sum of its proper divisors (1).

32228509 is an equidigital number, since it uses as much as digits as its factorization.

32228509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 32228509 is about 5677.0158534216. The cubic root of 32228509 is about 318.2341175107.

The spelling of 32228509 in words is "thirty-two million, two hundred twenty-eight thousand, five hundred nine".