2053866721 has 2 divisors, whose sum is σ = 2053866722. Its totient is φ = 2053866720.

The previous prime is 2053866691. The next prime is 2053866743. The reversal of 2053866721 is 1276683502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1618935696 + 434931025 = 40236^2 + 20855^2 .

It is a cyclic number.

It is not a de Polignac number, because 2053866721 - 2⁷ = 2053866593 is a prime.

It is not a weakly prime, because it can be changed into another prime (2053864721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1026933360 + 1026933361.

It is an arithmetic number, because the mean of its divisors is an integer number (1026933361).

Almost surely, 2^2053866721 is an apocalyptic number.

It is an amenable number.

2053866721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2053866721 is an equidigital number, since it uses as much as digits as its factorization.

2053866721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 2053866721 is about 45319.6063641334. The cubic root of 2053866721 is about 1271.1322947857.

The spelling of 2053866721 in words is "two billion, fifty-three million, eight hundred sixty-six thousand, seven hundred twenty-one".