65353821 has 12 divisors (see below), whose sum is σ = 94357728. Its totient is φ = 40217424.

The previous prime is 65353817. The next prime is 65353837. The reversal of 65353821 is 12835356.

It is not a de Polignac number, because 65353821 - 2² = 65353817 is a prime.

It is a super-3 number, since 3×65353821³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65353861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63945 + ... + 64958.

It is an arithmetic number, because the mean of its divisors is an integer number (7863144).

Almost surely, 2^65353821 is an apocalyptic number.

It is an amenable number.

65353821 is a deficient number, since it is larger than the sum of its proper divisors (29003907).

65353821 is a wasteful number, since it uses less digits than its factorization.

65353821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128932 (or 128919 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 65353821 is about 8084.1710150145. The cubic root of 65353821 is about 402.8008033948.

The spelling of 65353821 in words is "sixty-five million, three hundred fifty-three thousand, eight hundred twenty-one".