2105552321 has 2 divisors, whose sum is σ = 2105552322. Its totient is φ = 2105552320.

The previous prime is 2105552297. The next prime is 2105552329. The reversal of 2105552321 is 1232555012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1769380096 + 336172225 = 42064^2 + 18335^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105552321 - 2¹⁰ = 2105551297 is a prime.

It is not a weakly prime, because it can be changed into another prime (2105552329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052776160 + 1052776161.

It is an arithmetic number, because the mean of its divisors is an integer number (1052776161).

Almost surely, 2^2105552321 is an apocalyptic number.

It is an amenable number.

2105552321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105552321 is an equidigital number, since it uses as much as digits as its factorization.

2105552321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 2105552321 is about 45886.2977478027. The cubic root of 2105552321 is about 1281.7067728324.

The spelling of 2105552321 in words is "two billion, one hundred five million, five hundred fifty-two thousand, three hundred twenty-one".