75321231 has 8 divisors (see below), whose sum is σ = 100990080. Its totient is φ = 49933272.

The previous prime is 75321193. The next prime is 75321241. The reversal of 75321231 is 13212357.

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

It is not a de Polignac number, because 75321231 - 2⁹ = 75320719 is a prime.

It is a super-2 number, since 2×75321231² = 11346575678710722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75321241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69595 + ... + 70668.

It is an arithmetic number, because the mean of its divisors is an integer number (12623760).

Almost surely, 2^75321231 is an apocalyptic number.

75321231 is a deficient number, since it is larger than the sum of its proper divisors (25668849).

75321231 is a wasteful number, since it uses less digits than its factorization.

75321231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140445.

The product of its digits is 1260, while the sum is 24.

The square root of 75321231 is about 8678.7805018908. The cubic root of 75321231 is about 422.3175566992.

Adding to 75321231 its reverse (13212357), we get a palindrome (88533588).

The spelling of 75321231 in words is "seventy-five million, three hundred twenty-one thousand, two hundred thirty-one".