551819801 has 16 divisors (see below), whose sum is σ = 615829200. Its totient is φ = 490952448.

The previous prime is 551819777. The next prime is 551819833. The reversal of 551819801 is 108918155.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 274576 + 551545225 = 524^2 + 23485^2 .

It is a cyclic number.

It is not a de Polignac number, because 551819801 - 2²⁶ = 484710937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551819701) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 329795 + ... + 331463.

It is an arithmetic number, because the mean of its divisors is an integer number (38489325).

Almost surely, 2^551819801 is an apocalyptic number.

It is an amenable number.

551819801 is a deficient number, since it is larger than the sum of its proper divisors (64009399).

551819801 is a wasteful number, since it uses less digits than its factorization.

551819801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2588.

The product of its (nonzero) digits is 14400, while the sum is 38.

The square root of 551819801 is about 23490.8450465282. The cubic root of 551819801 is about 820.2239131725.

The spelling of 551819801 in words is "five hundred fifty-one million, eight hundred nineteen thousand, eight hundred one".