75385431 has 16 divisors (see below), whose sum is σ = 121835520. Its totient is φ = 45687960.

The previous prime is 75385411. The next prime is 75385433. The reversal of 75385431 is 13458357.

It is a de Polignac number, because none of the positive numbers 2^k-75385431 is a prime.

It is a super-2 number, since 2×75385431² = 11365926414111522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75385433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126615 + ... + 127208.

It is an arithmetic number, because the mean of its divisors is an integer number (7614720).

Almost surely, 2^75385431 is an apocalyptic number.

75385431 is a deficient number, since it is larger than the sum of its proper divisors (46450089).

75385431 is a wasteful number, since it uses less digits than its factorization.

75385431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253843 (or 253837 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 75385431 is about 8682.4783904136. The cubic root of 75385431 is about 422.4375099857.

The spelling of 75385431 in words is "seventy-five million, three hundred eighty-five thousand, four hundred thirty-one".