32250721 has 2 divisors, whose sum is σ = 32250722. Its totient is φ = 32250720.

The previous prime is 32250709. The next prime is 32250727. The reversal of 32250721 is 12705223.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28772496 + 3478225 = 5364^2 + 1865^2 .

It is a cyclic number.

It is not a de Polignac number, because 32250721 - 2⁵ = 32250689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 32250692 and 32250701.

It is not a weakly prime, because it can be changed into another prime (32250727) 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, 16125360 + 16125361.

It is an arithmetic number, because the mean of its divisors is an integer number (16125361).

Almost surely, 2^32250721 is an apocalyptic number.

It is an amenable number.

32250721 is a deficient number, since it is larger than the sum of its proper divisors (1).

32250721 is an equidigital number, since it uses as much as digits as its factorization.

32250721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 32250721 is about 5678.9718259558. The cubic root of 32250721 is about 318.3072100733.

Adding to 32250721 its reverse (12705223), we get a palindrome (44955944).

The spelling of 32250721 in words is "thirty-two million, two hundred fifty thousand, seven hundred twenty-one".