551202161 has 4 divisors (see below), whose sum is σ = 560238324. Its totient is φ = 542166000.

The previous prime is 551202151. The next prime is 551202167. The reversal of 551202161 is 161202155.

It is a happy number.

551202161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32273761 + 518928400 = 5681^2 + 22780^2 .

It is a cyclic number.

It is not a de Polignac number, because 551202161 - 2⁶ = 551202097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551202167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4517990 + ... + 4518111.

It is an arithmetic number, because the mean of its divisors is an integer number (140059581).

Almost surely, 2^551202161 is an apocalyptic number.

It is an amenable number.

551202161 is a deficient number, since it is larger than the sum of its proper divisors (9036163).

551202161 is an equidigital number, since it uses as much as digits as its factorization.

551202161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9036162.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 551202161 is about 23477.6949677774. The cubic root of 551202161 is about 819.9177792833.

The spelling of 551202161 in words is "five hundred fifty-one million, two hundred two thousand, one hundred sixty-one".