2166053361 has 4 divisors (see below), whose sum is σ = 2888071152. Its totient is φ = 1444035572.

The previous prime is 2166053353. The next prime is 2166053377. The reversal of 2166053361 is 1633506612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2166053361 - 2³ = 2166053353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2166053381) 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, 361008891 + ... + 361008896.

It is an arithmetic number, because the mean of its divisors is an integer number (722017788).

Almost surely, 2^2166053361 is an apocalyptic number.

It is an amenable number.

2166053361 is a deficient number, since it is larger than the sum of its proper divisors (722017791).

2166053361 is an equidigital number, since it uses as much as digits as its factorization.

2166053361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722017790.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 2166053361 is about 46540.8783866398. The cubic root of 2166053361 is about 1293.8672405876.

Adding to 2166053361 its reverse (1633506612), we get a palindrome (3799559973).

The spelling of 2166053361 in words is "two billion, one hundred sixty-six million, fifty-three thousand, three hundred sixty-one".