551506320 has 100 divisors (see below), whose sum is σ = 1915485660. Its totient is φ = 147066624.

The previous prime is 551506271. The next prime is 551506327. The reversal of 551506320 is 23605155.

551506320 is a `hidden beast` number, since 551 + 50 + 63 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 215737344 + 335768976 = 14688^2 + 18324^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (551506327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 36075 + ... + 49034.

Almost surely, 2^551506320 is an apocalyptic number.

It is an amenable number.

551506320 is an abundant number, since it is smaller than the sum of its proper divisors (1363979340).

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

551506320 is a wasteful number, since it uses less digits than its factorization.

551506320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85134 (or 85119 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 551506320 is about 23484.1716907367. The cubic root of 551506320 is about 820.0685645623.

The spelling of 551506320 in words is "five hundred fifty-one million, five hundred six thousand, three hundred twenty".