551205204 has 96 divisors (see below), whose sum is σ = 1459261440. Its totient is φ = 160406400.

The previous prime is 551205197. The next prime is 551205209. The reversal of 551205204 is 402502155.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551205209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1190277 + ... + 1190739.

It is an arithmetic number, because the mean of its divisors is an integer number (15200640).

Almost surely, 2^551205204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551205204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (729630720).

551205204 is an abundant number, since it is smaller than the sum of its proper divisors (908056236).

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

551205204 is a wasteful number, since it uses less digits than its factorization.

551205204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821 (or 819 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 551205204 is about 23477.7597738796. The cubic root of 551205204 is about 819.9192881098.

Adding to 551205204 its reverse (402502155), we get a palindrome (953707359).

The spelling of 551205204 in words is "five hundred fifty-one million, two hundred five thousand, two hundred four".