533681 has 4 divisors (see below), whose sum is σ = 565092. Its totient is φ = 502272.

The previous prime is 533671. The next prime is 533693. The reversal of 533681 is 186335.

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 490000 + 43681 = 700^2 + 209^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-533681 is a prime.

It is a super-2 number, since 2×533681² = 569630819522, which contains 22 as substring.

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 533681.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 533681.

It is not an unprimeable number, because it can be changed into a prime (533641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15680 + ... + 15713.

It is an arithmetic number, because the mean of its divisors is an integer number (141273).

2⁵³³⁶⁸¹ is an apocalyptic number.

It is an amenable number.

533681 is a deficient number, since it is larger than the sum of its proper divisors (31411).

533681 is a wasteful number, since it uses less digits than its factorization.

533681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31410.

The product of its digits is 2160, while the sum is 26.

The square root of 533681 is about 730.5347356560. The cubic root of 533681 is about 81.1136442708.

The spelling of 533681 in words is "five hundred thirty-three thousand, six hundred eighty-one".