536221813 has 4 divisors (see below), whose sum is σ = 540444160. Its totient is φ = 531999468.

The previous prime is 536221801. The next prime is 536221823. The reversal of 536221813 is 318122635.

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, and also an emirpimes, since its reverse is a distinct semiprime: 318122635 = 5 ⋅63624527.

It is a cyclic number.

It is not a de Polignac number, because 536221813 - 2¹⁷ = 536090741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (536221823) 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, 2110983 + ... + 2111236.

It is an arithmetic number, because the mean of its divisors is an integer number (135111040).

Almost surely, 2^536221813 is an apocalyptic number.

It is an amenable number.

536221813 is a deficient number, since it is larger than the sum of its proper divisors (4222347).

536221813 is a wasteful number, since it uses less digits than its factorization.

536221813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4222346.

The product of its digits is 8640, while the sum is 31.

The square root of 536221813 is about 23156.4637412538. The cubic root of 536221813 is about 812.4216573931.

The spelling of 536221813 in words is "five hundred thirty-six million, two hundred twenty-one thousand, eight hundred thirteen".