75325521 has 16 divisors (see below), whose sum is σ = 106553664. Its totient is φ = 47169024.

The previous prime is 75325513. The next prime is 75325553. The reversal of 75325521 is 12552357.

It is not a de Polignac number, because 75325521 - 2³ = 75325513 is a prime.

It is a super-2 number, since 2×75325521² = 11347868227842882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (75325501) 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, 31645 + ... + 33941.

It is an arithmetic number, because the mean of its divisors is an integer number (6659604).

Almost surely, 2^75325521 is an apocalyptic number.

It is an amenable number.

75325521 is a deficient number, since it is larger than the sum of its proper divisors (31228143).

75325521 is a wasteful number, since it uses less digits than its factorization.

75325521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2960.

The product of its digits is 10500, while the sum is 30.

The square root of 75325521 is about 8679.0276529114. The cubic root of 75325521 is about 422.3255743940.

Adding to 75325521 its reverse (12552357), we get a palindrome (87877878).

The spelling of 75325521 in words is "seventy-five million, three hundred twenty-five thousand, five hundred twenty-one".