533530721 has 4 divisors (see below), whose sum is σ = 533860272. Its totient is φ = 533201172.

The previous prime is 533530681. The next prime is 533530729. The reversal of 533530721 is 127035335.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 533530721 - 2¹⁰ = 533529697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (533530729) 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, 162335 + ... + 165588.

It is an arithmetic number, because the mean of its divisors is an integer number (133465068).

Almost surely, 2^533530721 is an apocalyptic number.

It is an amenable number.

533530721 is a deficient number, since it is larger than the sum of its proper divisors (329551).

533530721 is a wasteful number, since it uses less digits than its factorization.

533530721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329550.

The product of its (nonzero) digits is 9450, while the sum is 29.

The square root of 533530721 is about 23098.2839405874. The cubic root of 533530721 is about 811.0602997083.

The spelling of 533530721 in words is "five hundred thirty-three million, five hundred thirty thousand, seven hundred twenty-one".