75133821 has 16 divisors (see below), whose sum is σ = 114627200. Its totient is φ = 42882048.

The previous prime is 75133811. The next prime is 75133831. The reversal of 75133821 is 12833157.

It is an interprime number because it is at equal distance from previous prime (75133811) and next prime (75133831).

It is not a de Polignac number, because 75133821 - 2⁵ = 75133789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75133811) 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 15 ways as a sum of consecutive naturals, for example, 22125 + ... + 25293.

It is an arithmetic number, because the mean of its divisors is an integer number (7164200).

Almost surely, 2^75133821 is an apocalyptic number.

It is an amenable number.

75133821 is a deficient number, since it is larger than the sum of its proper divisors (39493379).

75133821 is a wasteful number, since it uses less digits than its factorization.

75133821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4308.

The product of its digits is 5040, while the sum is 30.

The square root of 75133821 is about 8667.9767535452. The cubic root of 75133821 is about 421.9670036269.

Adding to 75133821 its reverse (12833157), we get a palindrome (87966978).

The spelling of 75133821 in words is "seventy-five million, one hundred thirty-three thousand, eight hundred twenty-one".