551431400 has 96 divisors (see below), whose sum is σ = 1392098400. Its totient is φ = 201926400.

The previous prime is 551431367. The next prime is 551431403. The reversal of 551431400 is 4134155.

It is not an unprimeable number, because it can be changed into a prime (551431403) 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, 339791 + ... + 341409.

It is an arithmetic number, because the mean of its divisors is an integer number (14501025).

Almost surely, 2^551431400 is an apocalyptic number.

551431400 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 551431400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (696049200).

551431400 is an abundant number, since it is smaller than the sum of its proper divisors (840667000).

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

551431400 is a wasteful number, since it uses less digits than its factorization.

551431400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779 (or 1770 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 551431400 is about 23482.5765196241. The cubic root of 551431400 is about 820.0314285000.

Adding to 551431400 its reverse (4134155), we get a palindrome (555565555).

The spelling of 551431400 in words is "five hundred fifty-one million, four hundred thirty-one thousand, four hundred".