551780100 has 243 divisors, whose sum is σ = 1860017887. Its totient is φ = 142067520.

The previous prime is 551780093. The next prime is 551780137. The reversal of 551780100 is 1087155.

The square root of 551780100 is 23490.

It is a perfect power (a square), and thus also a powerful number.

551780100 is a `hidden beast` number, since 551 + 7 + 8 + 0 + 100 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7584516 + 544195584 = 2754^2 + 23328^2 .

It is a tau number, because it is divible by the number of its divisors (243).

It is a super-4 number, since 4×551780100⁴ (a number of 36 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 19026886 + ... + 19026914.

Almost surely, 2^551780100 is an apocalyptic number.

551780100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

551780100 is the 23490-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551780100

551780100 is an abundant number, since it is smaller than the sum of its proper divisors (1308237787).

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

551780100 is an equidigital number, since it uses as much as digits as its factorization.

551780100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 39 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 27.

The cubic root of 551780100 is about 820.2042422035.

The spelling of 551780100 in words is "five hundred fifty-one million, seven hundred eighty thousand, one hundred".