551404400 has 30 divisors (see below), whose sum is σ = 1324750032. Its totient is φ = 220561600.

The previous prime is 551404391. The next prime is 551404417. The reversal of 551404400 is 4404155.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 688856 + ... + 689655.

Almost surely, 2^551404400 is an apocalyptic number.

551404400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

551404400 is an abundant number, since it is smaller than the sum of its proper divisors (773345632).

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

551404400 is a wasteful number, since it uses less digits than its factorization.

551404400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378529 (or 1378518 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 551404400 is about 23482.0016182607. The cubic root of 551404400 is about 820.0180444175.

Adding to 551404400 its reverse (4404155), we get a palindrome (555808555).

The spelling of 551404400 in words is "five hundred fifty-one million, four hundred four thousand, four hundred".