551500505 has 8 divisors (see below), whose sum is σ = 662674824. Its totient is φ = 440617600.

The previous prime is 551500493. The next prime is 551500507. The reversal of 551500505 is 505005155.

It can be written as a sum of positive squares in 4 ways, for example, as 39790864 + 511709641 = 6308^2 + 22621^2 .

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

It is not a de Polignac number, because 551500505 - 2⁴ = 551500489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551500507) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 68666 + ... + 76275.

It is an arithmetic number, because the mean of its divisors is an integer number (82834353).

Almost surely, 2^551500505 is an apocalyptic number.

It is an amenable number.

551500505 is a deficient number, since it is larger than the sum of its proper divisors (111174319).

551500505 is a wasteful number, since it uses less digits than its factorization.

551500505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145707.

The product of its (nonzero) digits is 3125, while the sum is 26.

The square root of 551500505 is about 23484.0478836167. The cubic root of 551500505 is about 820.0656823254.

The spelling of 551500505 in words is "five hundred fifty-one million, five hundred thousand, five hundred five".