64553331 has 8 divisors (see below), whose sum is σ = 86146704. Its totient is φ = 42997760.

The previous prime is 64553329. The next prime is 64553351. The reversal of 64553331 is 13335546.

It is a happy number.

64553331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64553331 - 2¹ = 64553329 is a prime.

It is a super-2 number, since 2×64553331² = 8334265086391122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64553351) 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 7 ways as a sum of consecutive naturals, for example, 5190 + ... + 12491.

It is an arithmetic number, because the mean of its divisors is an integer number (10768338).

Almost surely, 2^64553331 is an apocalyptic number.

64553331 is a deficient number, since it is larger than the sum of its proper divisors (21593373).

64553331 is a wasteful number, since it uses less digits than its factorization.

64553331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18901.

The product of its digits is 16200, while the sum is 30.

The square root of 64553331 is about 8034.5087590966. The cubic root of 64553331 is about 401.1494665691.

Adding to 64553331 its reverse (13335546), we get a palindrome (77888877).

The spelling of 64553331 in words is "sixty-four million, five hundred fifty-three thousand, three hundred thirty-one".