75503231 has 4 divisors (see below), whose sum is σ = 75520872. Its totient is φ = 75485592.

The previous prime is 75503213. The next prime is 75503237. The reversal of 75503231 is 13230557.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 75503231 - 2⁶ = 75503167 is a prime.

It is a super-2 number, since 2×75503231² = 11401475782878722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 75503231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75503237) 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, 2141 + ... + 12473.

It is an arithmetic number, because the mean of its divisors is an integer number (18880218).

Almost surely, 2^75503231 is an apocalyptic number.

75503231 is a deficient number, since it is larger than the sum of its proper divisors (17641).

75503231 is a wasteful number, since it uses less digits than its factorization.

75503231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17640.

The product of its (nonzero) digits is 3150, while the sum is 26.

The square root of 75503231 is about 8689.2595196599. The cubic root of 75503231 is about 422.6574341803.

Adding to 75503231 its reverse (13230557), we get a palindrome (88733788).

The spelling of 75503231 in words is "seventy-five million, five hundred three thousand, two hundred thirty-one".