75218641 has 4 divisors (see below), whose sum is σ = 77053284. Its totient is φ = 73384000.

The previous prime is 75218609. The next prime is 75218651. The reversal of 75218641 is 14681257.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14681257 = 733 ⋅20029.

It can be written as a sum of positive squares in 2 ways, for example, as 4322241 + 70896400 = 2079^2 + 8420^2 .

It is a cyclic number.

It is not a de Polignac number, because 75218641 - 2⁵ = 75218609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75218597 and 75218606.

It is not an unprimeable number, because it can be changed into a prime (75218651) 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, 917260 + ... + 917341.

It is an arithmetic number, because the mean of its divisors is an integer number (19263321).

Almost surely, 2^75218641 is an apocalyptic number.

It is an amenable number.

75218641 is a deficient number, since it is larger than the sum of its proper divisors (1834643).

75218641 is a wasteful number, since it uses less digits than its factorization.

75218641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834642.

The product of its digits is 13440, while the sum is 34.

The square root of 75218641 is about 8672.8680953881. The cubic root of 75218641 is about 422.1257327706.

Adding to 75218641 its reverse (14681257), we get a palindrome (89899898).

The spelling of 75218641 in words is "seventy-five million, two hundred eighteen thousand, six hundred forty-one".