35810221 has 2 divisors, whose sum is σ = 35810222. Its totient is φ = 35810220.

The previous prime is 35810219. The next prime is 35810237. The reversal of 35810221 is 12201853.

35810221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31866025 + 3944196 = 5645^2 + 1986^2 .

It is a cyclic number.

It is not a de Polignac number, because 35810221 - 2¹ = 35810219 is a prime.

Together with 35810219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 35810192 and 35810201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (35810821) 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, 17905110 + 17905111.

It is an arithmetic number, because the mean of its divisors is an integer number (17905111).

Almost surely, 2^35810221 is an apocalyptic number.

It is an amenable number.

35810221 is a deficient number, since it is larger than the sum of its proper divisors (1).

35810221 is an equidigital number, since it uses as much as digits as its factorization.

35810221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 35810221 is about 5984.1641855818. The cubic root of 35810221 is about 329.6114833882.

The spelling of 35810221 in words is "thirty-five million, eight hundred ten thousand, two hundred twenty-one".