551201400 has 288 divisors, whose sum is σ = 1984694400. Its totient is φ = 136684800.

The previous prime is 551201389. The next prime is 551201401. The reversal of 551201400 is 4102155.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551201401) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2428087 + ... + 2428313.

It is an arithmetic number, because the mean of its divisors is an integer number (6891300).

Almost surely, 2^551201400 is an apocalyptic number.

551201400 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 551201400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (992347200).

551201400 is an abundant number, since it is smaller than the sum of its proper divisors (1433493000).

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

551201400 is a wasteful number, since it uses less digits than its factorization.

551201400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 551201400 is about 23477.6787608997. The cubic root of 551201400 is about 819.9174019519.

Adding to 551201400 its reverse (4102155), we get a palindrome (555303555).

The spelling of 551201400 in words is "five hundred fifty-one million, two hundred one thousand, four hundred".