551000604 has 144 divisors (see below), whose sum is σ = 1685988864. Its totient is φ = 136836480.

The previous prime is 551000573. The next prime is 551000623. The reversal of 551000604 is 406000155.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 232594 + ... + 234950.

It is an arithmetic number, because the mean of its divisors is an integer number (11708256).

Almost surely, 2^551000604 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 551000604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (842994432).

551000604 is an abundant number, since it is smaller than the sum of its proper divisors (1134988260).

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

551000604 is a wasteful number, since it uses less digits than its factorization.

551000604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2416 (or 2403 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 551000604 is about 23473.4020542400. The cubic root of 551000604 is about 819.8178278638.

Adding to 551000604 its reverse (406000155), we get a palindrome (957000759).

The spelling of 551000604 in words is "five hundred fifty-one million, six hundred four", and thus it is an aban number.