64385331 has 4 divisors (see below), whose sum is σ = 85847112. Its totient is φ = 42923552.

The previous prime is 64385329. The next prime is 64385369. The reversal of 64385331 is 13358346.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64385331 - 2¹ = 64385329 is a prime.

It is a super-2 number, since 2×64385331² = 8290941695959122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64385292 and 64385301.

It is not an unprimeable number, because it can be changed into a prime (64385371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10730886 + ... + 10730891.

It is an arithmetic number, because the mean of its divisors is an integer number (21461778).

Almost surely, 2^64385331 is an apocalyptic number.

64385331 is a deficient number, since it is larger than the sum of its proper divisors (21461781).

64385331 is a wasteful number, since it uses less digits than its factorization.

64385331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21461780.

The product of its digits is 25920, while the sum is 33.

The square root of 64385331 is about 8024.0470462230. The cubic root of 64385331 is about 400.8011671732.

The spelling of 64385331 in words is "sixty-four million, three hundred eighty-five thousand, three hundred thirty-one".