551006561 has 8 divisors (see below), whose sum is σ = 657101184. Its totient is φ = 451756800.

The previous prime is 551006543. The next prime is 551006563. The reversal of 551006561 is 165600155.

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

It is not a de Polignac number, because 551006561 - 2¹⁰ = 551005537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (551006563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1711040 + ... + 1711361.

It is an arithmetic number, because the mean of its divisors is an integer number (82137648).

Almost surely, 2^551006561 is an apocalyptic number.

It is an amenable number.

551006561 is a deficient number, since it is larger than the sum of its proper divisors (106094623).

551006561 is a wasteful number, since it uses less digits than its factorization.

551006561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3422431.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 551006561 is about 23473.5289421936. The cubic root of 551006561 is about 819.8207822690.

The spelling of 551006561 in words is "five hundred fifty-one million, six thousand, five hundred sixty-one".