551397600 has 432 divisors, whose sum is σ = 2158268112. Its totient is φ = 131604480.

The previous prime is 551397599. The next prime is 551397611. The reversal of 551397600 is 6793155.

It is a happy number.

551397600 is a `hidden beast` number, since 551 + 39 + 76 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 71 ways as a sum of consecutive naturals, for example, 4024732 + ... + 4024868.

It is an arithmetic number, because the mean of its divisors is an integer number (4995991).

Almost surely, 2^551397600 is an apocalyptic number.

551397600 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 551397600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1079134056).

551397600 is an abundant number, since it is smaller than the sum of its proper divisors (1606870512).

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

551397600 is a wasteful number, since it uses less digits than its factorization.

551397600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 36.

The square root of 551397600 is about 23481.8568260689. The cubic root of 551397600 is about 820.0146735427.

The spelling of 551397600 in words is "five hundred fifty-one million, three hundred ninety-seven thousand, six hundred".