551131000 has 128 divisors (see below), whose sum is σ = 1508981760. Its totient is φ = 184464000.

The previous prime is 551130971. The next prime is 551131001. The reversal of 551131000 is 131155.

551131000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×551131000² = 607490758322000000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551131001) 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, 300085 + ... + 301915.

It is an arithmetic number, because the mean of its divisors is an integer number (11788920).

Almost surely, 2^551131000 is an apocalyptic number.

551131000 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 551131000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (754490880).

551131000 is an abundant number, since it is smaller than the sum of its proper divisors (957850760).

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

551131000 is a wasteful number, since it uses less digits than its factorization.

551131000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1902 (or 1888 counting only the distinct ones).

The product of its (nonzero) digits is 75, while the sum is 16.

The square root of 551131000 is about 23476.1794165916. The cubic root of 551131000 is about 819.8824935725.

Adding to 551131000 its reverse (131155), we get a palindrome (551262155).

The spelling of 551131000 in words is "five hundred fifty-one million, one hundred thirty-one thousand".