64650331 has 4 divisors (see below), whose sum is σ = 68053000. Its totient is φ = 61247664.

The previous prime is 64650329. The next prime is 64650347. The reversal of 64650331 is 13305646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13305646 = 2 ⋅6652823.

It is a cyclic number.

It is not a de Polignac number, because 64650331 - 2¹ = 64650329 is a prime.

It is a super-2 number, since 2×64650331² = 8359330596819122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64650331.

It is not an unprimeable number, because it can be changed into a prime (64650931) 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 3 ways as a sum of consecutive naturals, for example, 1701306 + ... + 1701343.

It is an arithmetic number, because the mean of its divisors is an integer number (17013250).

Almost surely, 2^64650331 is an apocalyptic number.

64650331 is a deficient number, since it is larger than the sum of its proper divisors (3402669).

64650331 is a wasteful number, since it uses less digits than its factorization.

64650331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3402668.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 64650331 is about 8040.5429543035. The cubic root of 64650331 is about 401.3502928936.

Adding to 64650331 its reverse (13305646), we get a palindrome (77955977).

The spelling of 64650331 in words is "sixty-four million, six hundred fifty thousand, three hundred thirty-one".