75228381 has 12 divisors (see below), whose sum is σ = 109153408. Its totient is φ = 49926024.

The previous prime is 75228347. The next prime is 75228403. The reversal of 75228381 is 18382257.

It is not a de Polignac number, because 75228381 - 2⁹ = 75227869 is a prime.

It is a super-2 number, since 2×75228381² = 11318618615762322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75228781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16735 + ... + 20748.

Almost surely, 2^75228381 is an apocalyptic number.

It is an amenable number.

75228381 is a deficient number, since it is larger than the sum of its proper divisors (33925027).

75228381 is a wasteful number, since it uses less digits than its factorization.

75228381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37712 (or 37709 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 75228381 is about 8673.4295984922. The cubic root of 75228381 is about 422.1439522223.

The spelling of 75228381 in words is "seventy-five million, two hundred twenty-eight thousand, three hundred eighty-one".