551001000 has 256 divisors, whose sum is σ = 1913932800. Its totient is φ = 130848000.

The previous prime is 551000987. The next prime is 551001049. The reversal of 551001000 is 100155.

551001000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1946859 + ... + 1947141.

It is an arithmetic number, because the mean of its divisors is an integer number (7476300).

Almost surely, 2^551001000 is an apocalyptic number.

551001000 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 551001000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (956966400).

551001000 is an abundant number, since it is smaller than the sum of its proper divisors (1362931800).

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

551001000 is a wasteful number, since it uses less digits than its factorization.

551001000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 25, while the sum is 12.

The square root of 551001000 is about 23473.4104893175. The cubic root of 551001000 is about 819.8180242627.

Adding to 551001000 its reverse (100155), we get a palindrome (551101155).

The spelling of 551001000 in words is "five hundred fifty-one million, one thousand".