75528331 has 4 divisors (see below), whose sum is σ = 79971192. Its totient is φ = 71085472.

The previous prime is 75528311. The next prime is 75528347. The reversal of 75528331 is 13382557.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13382557 = 59 ⋅226823.

It is a cyclic number.

It is not a de Polignac number, because 75528331 - 2⁹ = 75527819 is a prime.

It is a super-2 number, since 2×75528331² = 11409057567291122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75528301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2221405 + ... + 2221438.

It is an arithmetic number, because the mean of its divisors is an integer number (19992798).

Almost surely, 2^75528331 is an apocalyptic number.

75528331 is a deficient number, since it is larger than the sum of its proper divisors (4442861).

75528331 is a wasteful number, since it uses less digits than its factorization.

75528331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4442860.

The product of its digits is 25200, while the sum is 34.

The square root of 75528331 is about 8690.7037114379. The cubic root of 75528331 is about 422.7042645217.

The spelling of 75528331 in words is "seventy-five million, five hundred twenty-eight thousand, three hundred thirty-one".