2056621447 has 2 divisors, whose sum is σ = 2056621448. Its totient is φ = 2056621446.

The previous prime is 2056621423. The next prime is 2056621453. The reversal of 2056621447 is 7441266502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2056621447 - 2²³ = 2048232839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2056621417) 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, 1028310723 + 1028310724.

It is an arithmetic number, because the mean of its divisors is an integer number (1028310724).

Almost surely, 2^2056621447 is an apocalyptic number.

2056621447 is a deficient number, since it is larger than the sum of its proper divisors (1).

2056621447 is an equidigital number, since it uses as much as digits as its factorization.

2056621447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 2056621447 is about 45349.9883902962. The cubic root of 2056621447 is about 1271.7003382730.

Adding to 2056621447 its reverse (7441266502), we get a palindrome (9497887949).

The spelling of 2056621447 in words is "two billion, fifty-six million, six hundred twenty-one thousand, four hundred forty-seven".