75524521 has 2 divisors, whose sum is σ = 75524522. Its totient is φ = 75524520.

The previous prime is 75524509. The next prime is 75524539. The reversal of 75524521 is 12542557.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67322025 + 8202496 = 8205^2 + 2864^2 .

It is an emirp because it is prime and its reverse (12542557) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75524521 - 2¹⁵ = 75491753 is a prime.

It is not a weakly prime, because it can be changed into another prime (75524551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37762260 + 37762261.

It is an arithmetic number, because the mean of its divisors is an integer number (37762261).

Almost surely, 2^75524521 is an apocalyptic number.

It is an amenable number.

75524521 is a deficient number, since it is larger than the sum of its proper divisors (1).

75524521 is an equidigital number, since it uses as much as digits as its factorization.

75524521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14000, while the sum is 31.

The square root of 75524521 is about 8690.4845089327. The cubic root of 75524521 is about 422.6971566797.

The spelling of 75524521 in words is "seventy-five million, five hundred twenty-four thousand, five hundred twenty-one".