2051461021 has 2 divisors, whose sum is σ = 2051461022. Its totient is φ = 2051461020.

The previous prime is 2051460997. The next prime is 2051461033. The reversal of 2051461021 is 1201641502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1887902500 + 163558521 = 43450^2 + 12789^2 .

It is a cyclic number.

It is not a de Polignac number, because 2051461021 - 2¹¹ = 2051458973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2051460983 and 2051461001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2051461081) 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, 1025730510 + 1025730511.

It is an arithmetic number, because the mean of its divisors is an integer number (1025730511).

Almost surely, 2^2051461021 is an apocalyptic number.

It is an amenable number.

2051461021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051461021 is an equidigital number, since it uses as much as digits as its factorization.

2051461021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 2051461021 is about 45293.0570948793. The cubic root of 2051461021 is about 1270.6358072514.

The spelling of 2051461021 in words is "two billion, fifty-one million, four hundred sixty-one thousand, twenty-one".