75318431 has 2 divisors, whose sum is σ = 75318432. Its totient is φ = 75318430.

The previous prime is 75318409. The next prime is 75318461. The reversal of 75318431 is 13481357.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 75318431 - 2¹⁴ = 75302047 is a prime.

It is a super-2 number, since 2×75318431² = 11345732096603522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75318461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37659215 + 37659216.

It is an arithmetic number, because the mean of its divisors is an integer number (37659216).

Almost surely, 2^75318431 is an apocalyptic number.

75318431 is a deficient number, since it is larger than the sum of its proper divisors (1).

75318431 is an equidigital number, since it uses as much as digits as its factorization.

75318431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 32.

The square root of 75318431 is about 8678.6191874053. The cubic root of 75318431 is about 422.3123235408.

Adding to 75318431 its reverse (13481357), we get a palindrome (88799788).

The spelling of 75318431 in words is "seventy-five million, three hundred eighteen thousand, four hundred thirty-one".