202805013 has 4 divisors (see below), whose sum is σ = 270406688. Its totient is φ = 135203340.

The previous prime is 202805003. The next prime is 202805017. The reversal of 202805013 is 310508202.

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 not a de Polignac number, because 202805013 - 2⁴ = 202804997 is a prime.

It is a super-2 number, since 2×202805013² = 82259746595860338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202805017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33800833 + ... + 33800838.

It is an arithmetic number, because the mean of its divisors is an integer number (67601672).

Almost surely, 2^202805013 is an apocalyptic number.

It is an amenable number.

202805013 is a deficient number, since it is larger than the sum of its proper divisors (67601675).

202805013 is an equidigital number, since it uses as much as digits as its factorization.

202805013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67601674.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 202805013 is about 14240.9625025839. The cubic root of 202805013 is about 587.5248342000.

The spelling of 202805013 in words is "two hundred two million, eight hundred five thousand, thirteen".