75350221 has 2 divisors, whose sum is σ = 75350222. Its totient is φ = 75350220.

The previous prime is 75350213. The next prime is 75350237. The reversal of 75350221 is 12205357.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53494596 + 21855625 = 7314^2 + 4675^2 .

It is a cyclic number.

It is not a de Polignac number, because 75350221 - 2³ = 75350213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75350291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37675110 + 37675111.

It is an arithmetic number, because the mean of its divisors is an integer number (37675111).

Almost surely, 2^75350221 is an apocalyptic number.

It is an amenable number.

75350221 is a deficient number, since it is larger than the sum of its proper divisors (1).

75350221 is an equidigital number, since it uses as much as digits as its factorization.

75350221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 75350221 is about 8680.4505067421. The cubic root of 75350221 is about 422.3717309581.

Adding to 75350221 its reverse (12205357), we get a palindrome (87555578).

The spelling of 75350221 in words is "seventy-five million, three hundred fifty thousand, two hundred twenty-one".