75565321 has 8 divisors (see below), whose sum is σ = 84003584. Its totient is φ = 67502160.

The previous prime is 75565313. The next prime is 75565351. The reversal of 75565321 is 12356557.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 75565321 - 2³ = 75565313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75565351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93351 + ... + 94156.

It is an arithmetic number, because the mean of its divisors is an integer number (10500448).

Almost surely, 2^75565321 is an apocalyptic number.

It is an amenable number.

75565321 is a deficient number, since it is larger than the sum of its proper divisors (8438263).

75565321 is a wasteful number, since it uses less digits than its factorization.

75565321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187551.

The product of its digits is 31500, while the sum is 34.

The square root of 75565321 is about 8692.8315870032. The cubic root of 75565321 is about 422.7732597304.

The spelling of 75565321 in words is "seventy-five million, five hundred sixty-five thousand, three hundred twenty-one".