75229865 has 4 divisors (see below), whose sum is σ = 90275844. Its totient is φ = 60183888.

The previous prime is 75229859. The next prime is 75229867. The reversal of 75229865 is 56892257.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17909824 + 57320041 = 4232^2 + 7571^2 .

It is a cyclic number.

It is not a de Polignac number, because 75229865 - 2¹⁰ = 75228841 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (75229867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7522982 + ... + 7522991.

It is an arithmetic number, because the mean of its divisors is an integer number (22568961).

Almost surely, 2^75229865 is an apocalyptic number.

It is an amenable number.

75229865 is a deficient number, since it is larger than the sum of its proper divisors (15045979).

75229865 is a wasteful number, since it uses less digits than its factorization.

75229865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15045978.

The product of its digits is 302400, while the sum is 44.

The square root of 75229865 is about 8673.5151466980. The cubic root of 75229865 is about 422.1467280253.

The spelling of 75229865 in words is "seventy-five million, two hundred twenty-nine thousand, eight hundred sixty-five".