551202100 has 72 divisors (see below), whose sum is σ = 1228350200. Its totient is φ = 214617600.

The previous prime is 551202097. The next prime is 551202109. The reversal of 551202100 is 1202155.

It can be written as a sum of positive squares in 12 ways, for example, as 227346084 + 323856016 = 15078^2 + 17996^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551202109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 664486 + ... + 665314.

Almost surely, 2^551202100 is an apocalyptic number.

551202100 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 551202100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (614175100).

551202100 is an abundant number, since it is smaller than the sum of its proper divisors (677148100).

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

551202100 is a wasteful number, since it uses less digits than its factorization.

551202100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013 (or 1006 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 551202100 is about 23477.6936686720. The cubic root of 551202100 is about 819.9177490373.

Adding to 551202100 its reverse (1202155), we get a palindrome (552404255).

Subtracting from 551202100 its reverse (1202155), we obtain a palindrome (549999945).

The spelling of 551202100 in words is "five hundred fifty-one million, two hundred two thousand, one hundred".