551770201 has 4 divisors (see below), whose sum is σ = 552113892. Its totient is φ = 551426512.

The previous prime is 551770151. The next prime is 551770213. The reversal of 551770201 is 102077155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102077155 = 5 ⋅20415431.

It can be written as a sum of positive squares in 2 ways, for example, as 114918400 + 436851801 = 10720^2 + 20901^2 .

It is a cyclic number.

It is not a de Polignac number, because 551770201 - 2²¹ = 549673049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 551770201.

It is not an unprimeable number, because it can be changed into a prime (551770001) 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 3 ways as a sum of consecutive naturals, for example, 169426 + ... + 172651.

It is an arithmetic number, because the mean of its divisors is an integer number (138028473).

Almost surely, 2^551770201 is an apocalyptic number.

It is an amenable number.

551770201 is a deficient number, since it is larger than the sum of its proper divisors (343691).

551770201 is a wasteful number, since it uses less digits than its factorization.

551770201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343690.

The product of its (nonzero) digits is 2450, while the sum is 28.

The square root of 551770201 is about 23489.7892923713. The cubic root of 551770201 is about 820.1993373206.

The spelling of 551770201 in words is "five hundred fifty-one million, seven hundred seventy thousand, two hundred one".