64220533 has 8 divisors (see below), whose sum is σ = 69587168. Its totient is φ = 58914864.

The previous prime is 64220521. The next prime is 64220539. The reversal of 64220533 is 33502246.

It is a happy number.

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 64220533 - 2¹³ = 64212341 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64220498 and 64220507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64220539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13035 + ... + 17272.

It is an arithmetic number, because the mean of its divisors is an integer number (8698396).

Almost surely, 2^64220533 is an apocalyptic number.

It is an amenable number.

64220533 is a deficient number, since it is larger than the sum of its proper divisors (5366635).

64220533 is a wasteful number, since it uses less digits than its factorization.

64220533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30483.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 64220533 is about 8013.7714591820. The cubic root of 64220533 is about 400.4589170365.

Adding to 64220533 its reverse (33502246), we get a palindrome (97722779).

The spelling of 64220533 in words is "sixty-four million, two hundred twenty thousand, five hundred thirty-three".