551404420 has 24 divisors (see below), whose sum is σ = 1323370944. Its totient is φ = 189052896.

The previous prime is 551404417. The next prime is 551404433. The reversal of 551404420 is 24404155.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1969162 + ... + 1969441.

It is an arithmetic number, because the mean of its divisors is an integer number (55140456).

Almost surely, 2^551404420 is an apocalyptic number.

It is an amenable number.

551404420 is an abundant number, since it is smaller than the sum of its proper divisors (771966524).

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

551404420 is a wasteful number, since it uses less digits than its factorization.

551404420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3938619 (or 3938617 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 551404420 is about 23482.0020441188. The cubic root of 551404420 is about 820.0180543318.

Adding to 551404420 its reverse (24404155), we get a palindrome (575808575).

The spelling of 551404420 in words is "five hundred fifty-one million, four hundred four thousand, four hundred twenty".