551397000 has 576 divisors, whose sum is σ = 2270661120. Its totient is φ = 110880000.

The previous prime is 551396957. The next prime is 551397013. The reversal of 551397000 is 793155.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 143 ways as a sum of consecutive naturals, for example, 17786985 + ... + 17787015.

It is an arithmetic number, because the mean of its divisors is an integer number (3942120).

Almost surely, 2^551397000 is an apocalyptic number.

551397000 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 551397000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1135330560).

551397000 is an abundant number, since it is smaller than the sum of its proper divisors (1719264120).

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

551397000 is a wasteful number, since it uses less digits than its factorization.

551397000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 4725, while the sum is 30.

The square root of 551397000 is about 23481.8440502444. The cubic root of 551397000 is about 820.0143761112.

The spelling of 551397000 in words is "five hundred fifty-one million, three hundred ninety-seven thousand".