551405406 has 8 divisors (see below), whose sum is σ = 1102810824. Its totient is φ = 183801800.

The previous prime is 551405399. The next prime is 551405417. The reversal of 551405406 is 604504155.

It is a sphenic number, since it is the product of 3 distinct primes.

551405406 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45950445 + ... + 45950456.

It is an arithmetic number, because the mean of its divisors is an integer number (137851353).

Almost surely, 2^551405406 is an apocalyptic number.

551405406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

551405406 is a wasteful number, since it uses less digits than its factorization.

551405406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91900906.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 551405406 is about 23482.0230389121. The cubic root of 551405406 is about 820.0185431064.

The spelling of 551405406 in words is "five hundred fifty-one million, four hundred five thousand, four hundred six".