551056565 has 8 divisors (see below), whose sum is σ = 661720920. Its totient is φ = 440543232.

The previous prime is 551056559. The next prime is 551056603. The reversal of 551056565 is 565650155.

It can be written as a sum of positive squares in 4 ways, for example, as 114789796 + 436266769 = 10714^2 + 20887^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 551056565 - 2⁶ = 551056501 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29564 + ... + 44453.

It is an arithmetic number, because the mean of its divisors is an integer number (82715115).

Almost surely, 2^551056565 is an apocalyptic number.

It is an amenable number.

551056565 is a deficient number, since it is larger than the sum of its proper divisors (110664355).

551056565 is a wasteful number, since it uses less digits than its factorization.

551056565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75511.

The product of its (nonzero) digits is 112500, while the sum is 38.

The square root of 551056565 is about 23474.5940326984. The cubic root of 551056565 is about 819.8455811742.

The spelling of 551056565 in words is "five hundred fifty-one million, fifty-six thousand, five hundred sixty-five".