75182521 has 2 divisors, whose sum is σ = 75182522. Its totient is φ = 75182520.

The previous prime is 75182507. The next prime is 75182531. The reversal of 75182521 is 12528157.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61779600 + 13402921 = 7860^2 + 3661^2 .

It is a cyclic number.

It is not a de Polignac number, because 75182521 - 2¹³ = 75174329 is a prime.

It is a super-2 number, since 2×75182521² = 11304822927830882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (75182501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37591260 + 37591261.

It is an arithmetic number, because the mean of its divisors is an integer number (37591261).

Almost surely, 2^75182521 is an apocalyptic number.

It is an amenable number.

75182521 is a deficient number, since it is larger than the sum of its proper divisors (1).

75182521 is an equidigital number, since it uses as much as digits as its factorization.

75182521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5600, while the sum is 31.

The square root of 75182521 is about 8670.7854892161. The cubic root of 75182521 is about 422.0581536773.

The spelling of 75182521 in words is "seventy-five million, one hundred eighty-two thousand, five hundred twenty-one".