2045958221 has 2 divisors, whose sum is σ = 2045958222. Its totient is φ = 2045958220.

The previous prime is 2045958199. The next prime is 2045958263. The reversal of 2045958221 is 1228595402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1826622121 + 219336100 = 42739^2 + 14810^2 .

It is a cyclic number.

It is not a de Polignac number, because 2045958221 - 2¹⁰ = 2045957197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2045958121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1022979110 + 1022979111.

It is an arithmetic number, because the mean of its divisors is an integer number (1022979111).

Almost surely, 2^2045958221 is an apocalyptic number.

It is an amenable number.

2045958221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2045958221 is an equidigital number, since it uses as much as digits as its factorization.

2045958221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 2045958221 is about 45232.2696865855. The cubic root of 2045958221 is about 1269.4986801394.

The spelling of 2045958221 in words is "two billion, forty-five million, nine hundred fifty-eight thousand, two hundred twenty-one".