53665501 has 4 divisors (see below), whose sum is σ = 54088192. Its totient is φ = 53242812.

The previous prime is 53665489. The next prime is 53665517. The reversal of 53665501 is 10556635.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53665501 - 2⁷ = 53665373 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 (53665571) 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, 211155 + ... + 211408.

It is an arithmetic number, because the mean of its divisors is an integer number (13522048).

Almost surely, 2^53665501 is an apocalyptic number.

It is an amenable number.

53665501 is a deficient number, since it is larger than the sum of its proper divisors (422691).

53665501 is a wasteful number, since it uses less digits than its factorization.

53665501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422690.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 53665501 is about 7325.6740986752. The cubic root of 53665501 is about 377.1942491608.

The spelling of 53665501 in words is "fifty-three million, six hundred sixty-five thousand, five hundred one".