75715521 has 16 divisors (see below), whose sum is σ = 115507200. Its totient is φ = 43216848.

The previous prime is 75715499. The next prime is 75715529. The reversal of 75715521 is 12551757.

It is not a de Polignac number, because 75715521 - 2⁵ = 75715489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75715529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25450 + ... + 28268.

It is an arithmetic number, because the mean of its divisors is an integer number (7219200).

Almost surely, 2^75715521 is an apocalyptic number.

It is an amenable number.

75715521 is a deficient number, since it is larger than the sum of its proper divisors (39791679).

75715521 is a wasteful number, since it uses less digits than its factorization.

75715521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4108.

The product of its digits is 12250, while the sum is 33.

The square root of 75715521 is about 8701.4666005220. The cubic root of 75715521 is about 423.0531875957.

The spelling of 75715521 in words is "seventy-five million, seven hundred fifteen thousand, five hundred twenty-one".