551555825 has 12 divisors (see below), whose sum is σ = 689985228. Its totient is φ = 437337600.

The previous prime is 551555791. The next prime is 551555831. The reversal of 551555825 is 528555155.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 201753616 + 349802209 = 14204^2 + 18703^2 .

It is not a de Polignac number, because 551555825 - 2¹⁸ = 551293681 is a prime.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 94796 + ... + 100445.

It is an arithmetic number, because the mean of its divisors is an integer number (57498769).

Almost surely, 2^551555825 is an apocalyptic number.

It is an amenable number.

551555825 is a deficient number, since it is larger than the sum of its proper divisors (138429403).

551555825 is a wasteful number, since it uses less digits than its factorization.

551555825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195364 (or 195359 counting only the distinct ones).

The product of its digits is 250000, while the sum is 41.

The square root of 551555825 is about 23485.2256748791. The cubic root of 551555825 is about 820.0931011681.

The spelling of 551555825 in words is "five hundred fifty-one million, five hundred fifty-five thousand, eight hundred twenty-five".