75000221 has 4 divisors (see below), whose sum is σ = 77027292. Its totient is φ = 72973152.

The previous prime is 75000197. The next prime is 75000227. The reversal of 75000221 is 12200057.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12200057 = 907 ⋅13451.

It can be written as a sum of positive squares in 2 ways, for example, as 64176121 + 10824100 = 8011^2 + 3290^2 .

It is a cyclic number.

It is not a de Polignac number, because 75000221 - 2⁶ = 75000157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 75000221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75000227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1013480 + ... + 1013553.

It is an arithmetic number, because the mean of its divisors is an integer number (19256823).

Almost surely, 2^75000221 is an apocalyptic number.

It is an amenable number.

75000221 is a deficient number, since it is larger than the sum of its proper divisors (2027071).

75000221 is a wasteful number, since it uses less digits than its factorization.

75000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2027070.

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 75000221 is about 8660.2667972759. The cubic root of 75000221 is about 421.7167468696.

Adding to 75000221 its reverse (12200057), we get a palindrome (87200278).

The spelling of 75000221 in words is "seventy-five million, two hundred twenty-one", and thus it is an aban number.