53305665 has 16 divisors (see below), whose sum is σ = 97473408. Its totient is φ = 24368256.

The previous prime is 53305657. The next prime is 53305717. The reversal of 53305665 is 56650335.

It is not a de Polignac number, because 53305665 - 2³ = 53305657 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253732 + ... + 253941.

It is an arithmetic number, because the mean of its divisors is an integer number (6092088).

Almost surely, 2^53305665 is an apocalyptic number.

It is an amenable number.

53305665 is a deficient number, since it is larger than the sum of its proper divisors (44167743).

53305665 is a wasteful number, since it uses less digits than its factorization.

53305665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507688.

The product of its (nonzero) digits is 40500, while the sum is 33.

The square root of 53305665 is about 7301.0728663670. The cubic root of 53305665 is about 376.3493080466.

The spelling of 53305665 in words is "fifty-three million, three hundred five thousand, six hundred sixty-five".