551255536 has 80 divisors (see below), whose sum is σ = 1220546880. Its totient is φ = 239247360.

The previous prime is 551255503. The next prime is 551255543. The reversal of 551255536 is 635552155.

551255536 = 4135² + 4136² + ... + 4166².

It is a junction number, because it is equal to n+sod(n) for n = 551255495 and 551255504.

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 15 ways as a sum of consecutive naturals, for example, 290880 + ... + 292768.

It is an arithmetic number, because the mean of its divisors is an integer number (15256836).

Almost surely, 2^551255536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551255536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (610273440).

551255536 is an abundant number, since it is smaller than the sum of its proper divisors (669291344).

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

551255536 is a wasteful number, since it uses less digits than its factorization.

551255536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994 (or 1988 counting only the distinct ones).

The product of its digits is 112500, while the sum is 37.

The square root of 551255536 is about 23478.8316574739. The cubic root of 551255536 is about 819.9442436806.

The spelling of 551255536 in words is "five hundred fifty-one million, two hundred fifty-five thousand, five hundred thirty-six".