65229921 has 16 divisors (see below), whose sum is σ = 99755520. Its totient is φ = 42083280.

The previous prime is 65229919. The next prime is 65229973. The reversal of 65229921 is 12992256.

It is a happy number.

65229921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65229921 - 2¹ = 65229919 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65229821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38130 + ... + 39803.

It is an arithmetic number, because the mean of its divisors is an integer number (6234720).

Almost surely, 2^65229921 is an apocalyptic number.

It is an amenable number.

65229921 is a deficient number, since it is larger than the sum of its proper divisors (34525599).

65229921 is a wasteful number, since it uses less digits than its factorization.

65229921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77973 (or 77967 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 65229921 is about 8076.5042561742. The cubic root of 65229921 is about 402.5460945371.

The spelling of 65229921 in words is "sixty-five million, two hundred twenty-nine thousand, nine hundred twenty-one".