53665345 has 8 divisors (see below), whose sum is σ = 68186664. Its totient is φ = 40406784.

The previous prime is 53665343. The next prime is 53665349. The reversal of 53665345 is 54356635.

53665345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 24591681 + 29073664 = 4959^2 + 5392^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53665345 - 2¹ = 53665343 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53665343) 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 7 ways as a sum of consecutive naturals, for example, 315594 + ... + 315763.

It is an arithmetic number, because the mean of its divisors is an integer number (8523333).

Almost surely, 2^53665345 is an apocalyptic number.

It is an amenable number.

53665345 is a deficient number, since it is larger than the sum of its proper divisors (14521319).

53665345 is a wasteful number, since it uses less digits than its factorization.

53665345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631379.

The product of its digits is 162000, while the sum is 37.

The square root of 53665345 is about 7325.6634511831. The cubic root of 53665345 is about 377.1938836724.

The spelling of 53665345 in words is "fifty-three million, six hundred sixty-five thousand, three hundred forty-five".