533040021 has 20 divisors (see below), whose sum is σ = 809330764. Its totient is φ = 349531200.

The previous prime is 533040017. The next prime is 533040023. The reversal of 533040021 is 120040335.

It can be written as a sum of positive squares in 2 ways, for example, as 62583921 + 470456100 = 7911^2 + 21690^2 .

It is not a de Polignac number, because 533040021 - 2² = 533040017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 533039976 and 533040003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (533040023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 49000 + ... + 58881.

Almost surely, 2^533040021 is an apocalyptic number.

It is an amenable number.

533040021 is a deficient number, since it is larger than the sum of its proper divisors (276290743).

533040021 is a wasteful number, since it uses less digits than its factorization.

533040021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107954 (or 107945 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 533040021 is about 23087.6594959299. The cubic root of 533040021 is about 810.8115734098.

Adding to 533040021 its reverse (120040335), we get a palindrome (653080356).

The spelling of 533040021 in words is "five hundred thirty-three million, forty thousand, twenty-one".