551404040 has 64 divisors (see below), whose sum is σ = 1372066560. Its totient is φ = 197752320.

The previous prime is 551404033. The next prime is 551404067. The reversal of 551404040 is 40404155.

It is a junction number, because it is equal to n+sod(n) for n = 551403997 and 551404015.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23537 + ... + 40703.

It is an arithmetic number, because the mean of its divisors is an integer number (21438540).

Almost surely, 2^551404040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551404040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (686033280).

551404040 is an abundant number, since it is smaller than the sum of its proper divisors (820662520).

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

551404040 is a wasteful number, since it uses less digits than its factorization.

551404040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17262 (or 17258 counting only the distinct ones).

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

The square root of 551404040 is about 23481.9939528141. The cubic root of 551404040 is about 820.0178659601.

Adding to 551404040 its reverse (40404155), we get a palindrome (591808195).

The spelling of 551404040 in words is "five hundred fifty-one million, four hundred four thousand, forty".