53303665 has 4 divisors (see below), whose sum is σ = 63964404. Its totient is φ = 42642928.

The previous prime is 53303641. The next prime is 53303681. The reversal of 53303665 is 56630335.

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 22733824 + 30569841 = 4768^2 + 5529^2 .

It is a cyclic number.

It is not a de Polignac number, because 53303665 - 2⁹ = 53303153 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5330362 + ... + 5330371.

It is an arithmetic number, because the mean of its divisors is an integer number (15991101).

Almost surely, 2^53303665 is an apocalyptic number.

It is an amenable number.

53303665 is a deficient number, since it is larger than the sum of its proper divisors (10660739).

53303665 is a wasteful number, since it uses less digits than its factorization.

53303665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10660738.

The product of its (nonzero) digits is 24300, while the sum is 31.

The square root of 53303665 is about 7300.9358989105. The cubic root of 53303665 is about 376.3446011796.

The spelling of 53303665 in words is "fifty-three million, three hundred three thousand, six hundred sixty-five".