551401400 has 96 divisors (see below), whose sum is σ = 1425243600. Its totient is φ = 196684800.

The previous prime is 551401397. The next prime is 551401421. The reversal of 551401400 is 4104155.

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 23 ways as a sum of consecutive naturals, for example, 114236 + ... + 118964.

Almost surely, 2^551401400 is an apocalyptic number.

551401400 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 551401400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (712621800).

551401400 is an abundant number, since it is smaller than the sum of its proper divisors (873842200).

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

551401400 is a wasteful number, since it uses less digits than its factorization.

551401400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4809 (or 4800 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 551401400 is about 23481.9377394626. The cubic root of 551401400 is about 820.0165572703.

Adding to 551401400 its reverse (4104155), we get a palindrome (555505555).

The spelling of 551401400 in words is "five hundred fifty-one million, four hundred one thousand, four hundred".