204212253 has 20 divisors (see below), whose sum is σ = 317655808. Its totient is φ = 116688600.

The previous prime is 204212251. The next prime is 204212291. The reversal of 204212253 is 352212402.

It is not a de Polignac number, because 204212253 - 2¹ = 204212251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204212251) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6973 + ... + 21378.

Almost surely, 2^204212253 is an apocalyptic number.

It is an amenable number.

204212253 is a deficient number, since it is larger than the sum of its proper divisors (113443555).

204212253 is an frugal number, since it uses more digits than its factorization.

204212253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28382 (or 28361 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 204212253 is about 14290.2852665718. The cubic root of 204212253 is about 588.8806249081.

Adding to 204212253 its reverse (352212402), we get a palindrome (556424655).

The spelling of 204212253 in words is "two hundred four million, two hundred twelve thousand, two hundred fifty-three".