64533 has 12 divisors (see below), whose sum is σ = 100320. Its totient is φ = 36792.

The previous prime is 64513. The next prime is 64553. The reversal of 64533 is 33546.

It is an interprime number because it is at equal distance from previous prime (64513) and next prime (64553).

It is a de Polignac number, because none of the positive numbers 2^k-64533 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

64533 is a lucky number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73 + ... + 366.

It is an arithmetic number, because the mean of its divisors is an integer number (8360).

2⁶⁴⁵³³ is an apocalyptic number.

64533 is the 147-th octagonal number.

It is an amenable number.

64533 is a deficient number, since it is larger than the sum of its proper divisors (35787).

64533 is a wasteful number, since it uses less digits than its factorization.

64533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456 (or 449 counting only the distinct ones).

The product of its digits is 1080, while the sum is 21.

The square root of 64533 is about 254.0334623627. The cubic root of 64533 is about 40.1107348287.

The spelling of 64533 in words is "sixty-four thousand, five hundred thirty-three".