2053400821 has 2 divisors, whose sum is σ = 2053400822. Its totient is φ = 2053400820.

The previous prime is 2053400779. The next prime is 2053400903. The reversal of 2053400821 is 1280043502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1790474596 + 262926225 = 42314^2 + 16215^2 .

It is a cyclic number.

It is not a de Polignac number, because 2053400821 - 2¹³ = 2053392629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2053400221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1026700410 + 1026700411.

It is an arithmetic number, because the mean of its divisors is an integer number (1026700411).

Almost surely, 2^2053400821 is an apocalyptic number.

It is an amenable number.

2053400821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2053400821 is an equidigital number, since it uses as much as digits as its factorization.

2053400821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 2053400821 is about 45314.4659132158. The cubic root of 2053400821 is about 1271.0361727872.

The spelling of 2053400821 in words is "two billion, fifty-three million, four hundred thousand, eight hundred twenty-one".