65521853 has 8 divisors (see below), whose sum is σ = 66583296. Its totient is φ = 64464400.

The previous prime is 65521849. The next prime is 65521867. The reversal of 65521853 is 35812556.

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 65521853 - 2² = 65521849 is a prime.

It is a super-2 number, since 2×65521853² = 8586226441107218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65521873) 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 7 ways as a sum of consecutive naturals, for example, 64175 + ... + 65187.

It is an arithmetic number, because the mean of its divisors is an integer number (8322912).

Almost surely, 2^65521853 is an apocalyptic number.

It is an amenable number.

65521853 is a deficient number, since it is larger than the sum of its proper divisors (1061443).

65521853 is a wasteful number, since it uses less digits than its factorization.

65521853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995.

The product of its digits is 36000, while the sum is 35.

The square root of 65521853 is about 8094.5569983786. The cubic root of 65521853 is about 403.1457232942.

The spelling of 65521853 in words is "sixty-five million, five hundred twenty-one thousand, eight hundred fifty-three".