2053550021 has 2 divisors, whose sum is σ = 2053550022. Its totient is φ = 2053550020.

The previous prime is 2053549997. The next prime is 2053550027. The reversal of 2053550021 is 1200553502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1839981025 + 213568996 = 42895^2 + 14614^2 .

It is a cyclic number.

It is not a de Polignac number, because 2053550021 - 2¹⁴ = 2053533637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2053550027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1026775010 + 1026775011.

It is an arithmetic number, because the mean of its divisors is an integer number (1026775011).

Almost surely, 2^2053550021 is an apocalyptic number.

It is an amenable number.

2053550021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2053550021 is an equidigital number, since it uses as much as digits as its factorization.

2053550021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 2053550021 is about 45316.1121567153. The cubic root of 2053550021 is about 1271.0669565164.

The spelling of 2053550021 in words is "two billion, fifty-three million, five hundred fifty thousand, twenty-one".