75403231 has 2 divisors, whose sum is σ = 75403232. Its totient is φ = 75403230.

The previous prime is 75403189. The next prime is 75403243. The reversal of 75403231 is 13230457.

It is a strong prime.

It is an emirp because it is prime and its reverse (13230457) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75403231 - 2¹⁷ = 75272159 is a prime.

It is a super-2 number, since 2×75403231² = 11371294490478722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 75403196 and 75403205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75403331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37701615 + 37701616.

It is an arithmetic number, because the mean of its divisors is an integer number (37701616).

Almost surely, 2^75403231 is an apocalyptic number.

75403231 is a deficient number, since it is larger than the sum of its proper divisors (1).

75403231 is an equidigital number, since it uses as much as digits as its factorization.

75403231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 75403231 is about 8683.5033828519. The cubic root of 75403231 is about 422.4707560026.

Adding to 75403231 its reverse (13230457), we get a palindrome (88633688).

The spelling of 75403231 in words is "seventy-five million, four hundred three thousand, two hundred thirty-one".