2051363221 has 2 divisors, whose sum is σ = 2051363222. Its totient is φ = 2051363220.

The previous prime is 2051363207. The next prime is 2051363231. The reversal of 2051363221 is 1223631502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2046567121 + 4796100 = 45239^2 + 2190^2 .

It is a cyclic number.

It is not a de Polignac number, because 2051363221 - 2¹¹ = 2051361173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2051363201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025681610 + 1025681611.

It is an arithmetic number, because the mean of its divisors is an integer number (1025681611).

Almost surely, 2^2051363221 is an apocalyptic number.

It is an amenable number.

2051363221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051363221 is an equidigital number, since it uses as much as digits as its factorization.

2051363221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 2051363221 is about 45291.9774463425. The cubic root of 2051363221 is about 1270.6156151126.

Adding to 2051363221 its reverse (1223631502), we get a palindrome (3274994723).

The spelling of 2051363221 in words is "two billion, fifty-one million, three hundred sixty-three thousand, two hundred twenty-one".