551161000 has 64 divisors (see below), whose sum is σ = 1388958480. Its totient is φ = 203500800.

The previous prime is 551160989. The next prime is 551161019. The reversal of 551161000 is 161155.

It can be written as a sum of positive squares in 8 ways, for example, as 695556 + 550465444 = 834^2 + 23462^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8199 + ... + 34198.

Almost surely, 2^551161000 is an apocalyptic number.

551161000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

551161000 is an abundant number, since it is smaller than the sum of its proper divisors (837797480).

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

551161000 is a wasteful number, since it uses less digits than its factorization.

551161000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42431 (or 42417 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 551161000 is about 23476.8183534311. The cubic root of 551161000 is about 819.8973696658.

The spelling of 551161000 in words is "five hundred fifty-one million, one hundred sixty-one thousand".