75171157 has 4 divisors (see below), whose sum is σ = 75216076. Its totient is φ = 75126240.

The previous prime is 75171149. The next prime is 75171193. The reversal of 75171157 is 75117157.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75117157 = 89 ⋅844013.

It can be written as a sum of positive squares in 2 ways, for example, as 15046641 + 60124516 = 3879^2 + 7754^2 .

It is a cyclic number.

It is not a de Polignac number, because 75171157 - 2³ = 75171149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75171137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19848 + ... + 23329.

It is an arithmetic number, because the mean of its divisors is an integer number (18804019).

Almost surely, 2^75171157 is an apocalyptic number.

It is an amenable number.

75171157 is a deficient number, since it is larger than the sum of its proper divisors (44919).

75171157 is a wasteful number, since it uses less digits than its factorization.

75171157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44918.

The product of its digits is 8575, while the sum is 34.

The square root of 75171157 is about 8670.1301604993. The cubic root of 75171157 is about 422.0368876061.

The spelling of 75171157 in words is "seventy-five million, one hundred seventy-one thousand, one hundred fifty-seven".