53145665 has 8 divisors (see below), whose sum is σ = 63850560. Its totient is φ = 42466032.

The previous prime is 53145649. The next prime is 53145667. The reversal of 53145665 is 56654135.

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 53145665 - 2⁴ = 53145649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53145667) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1325 + ... + 10394.

It is an arithmetic number, because the mean of its divisors is an integer number (7981320).

Almost surely, 2^53145665 is an apocalyptic number.

It is an amenable number.

53145665 is a deficient number, since it is larger than the sum of its proper divisors (10704895).

53145665 is a wasteful number, since it uses less digits than its factorization.

53145665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12631.

The product of its digits is 54000, while the sum is 35.

The square root of 53145665 is about 7290.1073380301. The cubic root of 53145665 is about 375.9723860247.

The spelling of 53145665 in words is "fifty-three million, one hundred forty-five thousand, six hundred sixty-five".