533065721 has 4 divisors (see below), whose sum is σ = 533214372. Its totient is φ = 532917072.

The previous prime is 533065669. The next prime is 533065769. The reversal of 533065721 is 127560335.

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

It can be written as a sum of positive squares in 2 ways, for example, as 203461696 + 329604025 = 14264^2 + 18155^2 .

It is a cyclic number.

It is not a de Polignac number, because 533065721 - 2¹⁴ = 533049337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (533065781) 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, 68810 + ... + 76163.

It is an arithmetic number, because the mean of its divisors is an integer number (133303593).

Almost surely, 2^533065721 is an apocalyptic number.

It is an amenable number.

533065721 is a deficient number, since it is larger than the sum of its proper divisors (148651).

533065721 is a wasteful number, since it uses less digits than its factorization.

533065721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148650.

The product of its (nonzero) digits is 18900, while the sum is 32.

The square root of 533065721 is about 23088.2160636113. The cubic root of 533065721 is about 810.8246040277.

The spelling of 533065721 in words is "five hundred thirty-three million, sixty-five thousand, seven hundred twenty-one".