555121400 has 96 divisors (see below), whose sum is σ = 1398727440. Its totient is φ = 204072960.

The previous prime is 555121379. The next prime is 555121409. The reversal of 555121400 is 4121555.

It is a happy number.

555121400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555121409) 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, 144302 + ... + 148098.

Almost surely, 2^555121400 is an apocalyptic number.

555121400 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 555121400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (699363720).

555121400 is an abundant number, since it is smaller than the sum of its proper divisors (843606040).

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

555121400 is a wasteful number, since it uses less digits than its factorization.

555121400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3873 (or 3864 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 555121400 is about 23561.0144094010. The cubic root of 555121400 is about 821.8564917015.

Adding to 555121400 its reverse (4121555), we get a palindrome (559242955).

The spelling of 555121400 in words is "five hundred fifty-five million, one hundred twenty-one thousand, four hundred".