533061721 has 4 divisors (see below), whose sum is σ = 533433600. Its totient is φ = 532689844.

The previous prime is 533061719. The next prime is 533061751. The reversal of 533061721 is 127160335.

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 533061721 - 2¹ = 533061719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 533061721.

It is not an unprimeable number, because it can be changed into a prime (533061751) 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, 183781 + ... + 186658.

It is an arithmetic number, because the mean of its divisors is an integer number (133358400).

Almost surely, 2^533061721 is an apocalyptic number.

It is an amenable number.

533061721 is a deficient number, since it is larger than the sum of its proper divisors (371879).

533061721 is a wasteful number, since it uses less digits than its factorization.

533061721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371878.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 533061721 is about 23088.1294391728. The cubic root of 533061721 is about 810.8225759435.

The spelling of 533061721 in words is "five hundred thirty-three million, sixty-one thousand, seven hundred twenty-one".