75221207 has 2 divisors, whose sum is σ = 75221208. Its totient is φ = 75221206.

The previous prime is 75221189. The next prime is 75221213. The reversal of 75221207 is 70212257.

It is a strong prime.

It is an emirp because it is prime and its reverse (70212257) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75221207 - 2⁶ = 75221143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75221507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37610603 + 37610604.

It is an arithmetic number, because the mean of its divisors is an integer number (37610604).

Almost surely, 2^75221207 is an apocalyptic number.

75221207 is a deficient number, since it is larger than the sum of its proper divisors (1).

75221207 is an equidigital number, since it uses as much as digits as its factorization.

75221207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 75221207 is about 8673.0160267349. The cubic root of 75221207 is about 422.1305328321.

The spelling of 75221207 in words is "seventy-five million, two hundred twenty-one thousand, two hundred seven".