551530100 has 108 divisors (see below), whose sum is σ = 1385328000. Its totient is φ = 189921600.

The previous prime is 551530093. The next prime is 551530121. The reversal of 551530100 is 1035155.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 228701 + ... + 231099.

Almost surely, 2^551530100 is an apocalyptic number.

551530100 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 551530100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (692664000).

551530100 is an abundant number, since it is smaller than the sum of its proper divisors (833797900).

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

551530100 is a wasteful number, since it uses less digits than its factorization.

551530100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2454 (or 2436 counting only the distinct ones).

The product of its (nonzero) digits is 375, while the sum is 20.

The square root of 551530100 is about 23484.6779837408. The cubic root of 551530100 is about 820.0803510396.

Adding to 551530100 its reverse (1035155), we get a palindrome (552565255).

The spelling of 551530100 in words is "five hundred fifty-one million, five hundred thirty thousand, one hundred".