551331000 has 192 divisors, whose sum is σ = 2033272800. Its totient is φ = 133632000.

The previous prime is 551330957. The next prime is 551331013. The reversal of 551331000 is 133155.

It is a happy number.

It is a super-2 number, since 2×551331000² = 607931743122000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 96216 + ... + 101784.

Almost surely, 2^551331000 is an apocalyptic number.

551331000 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 551331000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1016636400).

551331000 is an abundant number, since it is smaller than the sum of its proper divisors (1481941800).

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

551331000 is a wasteful number, since it uses less digits than its factorization.

551331000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5607 (or 5590 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 18.

The square root of 551331000 is about 23480.4386671118. The cubic root of 551331000 is about 819.9816573331.

Adding to 551331000 its reverse (133155), we get a palindrome (551464155).

The spelling of 551331000 in words is "five hundred fifty-one million, three hundred thirty-one thousand".