2040555221 has 2 divisors, whose sum is σ = 2040555222. Its totient is φ = 2040555220.

The previous prime is 2040555157. The next prime is 2040555233. The reversal of 2040555221 is 1225550402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1294992196 + 745563025 = 35986^2 + 27305^2 .

It is a cyclic number.

It is not a de Polignac number, because 2040555221 - 2⁶ = 2040555157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2040555821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1020277610 + 1020277611.

It is an arithmetic number, because the mean of its divisors is an integer number (1020277611).

Almost surely, 2^2040555221 is an apocalyptic number.

It is an amenable number.

2040555221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2040555221 is an equidigital number, since it uses as much as digits as its factorization.

2040555221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 2040555221 is about 45172.5051441693. The cubic root of 2040555221 is about 1268.3801906793.

The spelling of 2040555221 in words is "two billion, forty million, five hundred fifty-five thousand, two hundred twenty-one".