65625321 has 16 divisors (see below), whose sum is σ = 93921984. Its totient is φ = 40610304.

The previous prime is 65625319. The next prime is 65625331. The reversal of 65625321 is 12352656.

It is not a de Polignac number, because 65625321 - 2¹ = 65625319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65625311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5091 + ... + 12536.

It is an arithmetic number, because the mean of its divisors is an integer number (5870124).

Almost surely, 2^65625321 is an apocalyptic number.

It is an amenable number.

65625321 is a deficient number, since it is larger than the sum of its proper divisors (28296663).

65625321 is a wasteful number, since it uses less digits than its factorization.

65625321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17720.

The product of its digits is 10800, while the sum is 30.

The square root of 65625321 is about 8100.9456855357. The cubic root of 65625321 is about 403.3578191693.

Adding to 65625321 its reverse (12352656), we get a palindrome (77977977).

The spelling of 65625321 in words is "sixty-five million, six hundred twenty-five thousand, three hundred twenty-one".