535448821 has 4 divisors (see below), whose sum is σ = 537138252. Its totient is φ = 533759392.

The previous prime is 535448803. The next prime is 535448839. The reversal of 535448821 is 128844535.

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

It is an interprime number because it is at equal distance from previous prime (535448803) and next prime (535448839).

It can be written as a sum of positive squares in 2 ways, for example, as 93818596 + 441630225 = 9686^2 + 21015^2 .

It is a cyclic number.

It is not a de Polignac number, because 535448821 - 2¹⁵ = 535416053 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (535448021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 844240 + ... + 844873.

It is an arithmetic number, because the mean of its divisors is an integer number (134284563).

Almost surely, 2^535448821 is an apocalyptic number.

It is an amenable number.

535448821 is a deficient number, since it is larger than the sum of its proper divisors (1689431).

535448821 is a wasteful number, since it uses less digits than its factorization.

535448821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689430.

The product of its digits is 153600, while the sum is 40.

The square root of 535448821 is about 23139.7670904441. The cubic root of 535448821 is about 812.0310867801.

The spelling of 535448821 in words is "five hundred thirty-five million, four hundred forty-eight thousand, eight hundred twenty-one".