204253520 has 80 divisors (see below), whose sum is σ = 491754240. Its totient is φ = 78853632.

The previous prime is 204253519. The next prime is 204253549. The reversal of 204253520 is 25352402.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283721 + ... + 284439.

It is an arithmetic number, because the mean of its divisors is an integer number (6146928).

Almost surely, 2^204253520 is an apocalyptic number.

204253520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204253520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245877120).

204253520 is an abundant number, since it is smaller than the sum of its proper divisors (287500720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204253520 is a wasteful number, since it uses less digits than its factorization.

204253520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852 (or 846 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 204253520 is about 14291.7290766373. The cubic root of 204253520 is about 588.9202890315.

The spelling of 204253520 in words is "two hundred four million, two hundred fifty-three thousand, five hundred twenty".