75275251 has 4 divisors (see below), whose sum is σ = 78548112. Its totient is φ = 72002392.

The previous prime is 75275227. The next prime is 75275257. The reversal of 75275251 is 15257257.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15257257 = 23 ⋅663359.

It is a cyclic number.

It is not a de Polignac number, because 75275251 - 2⁵ = 75275219 is a prime.

It is a super-2 number, since 2×75275251² = 11332726826226002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75275257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1636396 + ... + 1636441.

It is an arithmetic number, because the mean of its divisors is an integer number (19637028).

Almost surely, 2^75275251 is an apocalyptic number.

75275251 is a deficient number, since it is larger than the sum of its proper divisors (3272861).

75275251 is a wasteful number, since it uses less digits than its factorization.

75275251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3272860.

The product of its digits is 24500, while the sum is 34.

The square root of 75275251 is about 8676.1311078153. The cubic root of 75275251 is about 422.2316043339.

The spelling of 75275251 in words is "seventy-five million, two hundred seventy-five thousand, two hundred fifty-one".