75240331 has 2 divisors, whose sum is σ = 75240332. Its totient is φ = 75240330.

The previous prime is 75240299. The next prime is 75240343. The reversal of 75240331 is 13304257.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 75240331 - 2⁵ = 75240299 is a prime.

It is a super-2 number, since 2×75240331² = 11322214817979122, which contains 22 as substring.

It is equal to p_4407604 and since 75240331 and 4407604 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 75240296 and 75240305.

It is not a weakly prime, because it can be changed into another prime (75240731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37620165 + 37620166.

It is an arithmetic number, because the mean of its divisors is an integer number (37620166).

Almost surely, 2^75240331 is an apocalyptic number.

75240331 is a deficient number, since it is larger than the sum of its proper divisors (1).

75240331 is an equidigital number, since it uses as much as digits as its factorization.

75240331 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 75240331 is about 8674.1184566502. The cubic root of 75240331 is about 422.1663035081.

Adding to 75240331 its reverse (13304257), we get a palindrome (88544588).

The spelling of 75240331 in words is "seventy-five million, two hundred forty thousand, three hundred thirty-one".