551243000 has 128 divisors (see below), whose sum is σ = 1608422400. Its totient is φ = 171792000.

The previous prime is 551242973. The next prime is 551243027. The reversal of 551243000 is 342155.

551243000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (551242973) and next prime (551243027).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73421 + ... + 80579.

It is an arithmetic number, because the mean of its divisors is an integer number (12565800).

Almost surely, 2^551243000 is an apocalyptic number.

551243000 is a gapful number since it is divisible by the number (50) 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 551243000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (804211200).

551243000 is an abundant number, since it is smaller than the sum of its proper divisors (1057179400).

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

551243000 is a wasteful number, since it uses less digits than its factorization.

551243000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7198 (or 7184 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 551243000 is about 23478.5646920760. The cubic root of 551243000 is about 819.9380282335.

Adding to 551243000 its reverse (342155), we get a palindrome (551585155).

The spelling of 551243000 in words is "five hundred fifty-one million, two hundred forty-three thousand".