75563221 has 4 divisors (see below), whose sum is σ = 75632832. Its totient is φ = 75493612.

The previous prime is 75563161. The next prime is 75563227. The reversal of 75563221 is 12236557.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 75563221 - 2¹¹ = 75561173 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75563227) 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, 33151 + ... + 35356.

It is an arithmetic number, because the mean of its divisors is an integer number (18908208).

Almost surely, 2^75563221 is an apocalyptic number.

It is an amenable number.

75563221 is a deficient number, since it is larger than the sum of its proper divisors (69611).

75563221 is a wasteful number, since it uses less digits than its factorization.

75563221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69610.

The product of its digits is 12600, while the sum is 31.

The square root of 75563221 is about 8692.7107969839. The cubic root of 75563221 is about 422.7693433304.

Adding to 75563221 its reverse (12236557), we get a palindrome (87799778).

The spelling of 75563221 in words is "seventy-five million, five hundred sixty-three thousand, two hundred twenty-one".