5921554721 has 2 divisors, whose sum is σ = 5921554722. Its totient is φ = 5921554720.

The previous prime is 5921554697. The next prime is 5921554781. The reversal of 5921554721 is 1274551295.

5921554721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5143758400 + 777796321 = 71720^2 + 27889^2 .

It is a cyclic number.

It is not a de Polignac number, because 5921554721 - 2¹⁰ = 5921553697 is a prime.

It is not a weakly prime, because it can be changed into another prime (5921554781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2960777360 + 2960777361.

It is an arithmetic number, because the mean of its divisors is an integer number (2960777361).

Almost surely, 2^5921554721 is an apocalyptic number.

It is an amenable number.

5921554721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5921554721 is an equidigital number, since it uses as much as digits as its factorization.

5921554721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 126000, while the sum is 41.

The square root of 5921554721 is about 76951.6388454463. The cubic root of 5921554721 is about 1809.1666871107.

The spelling of 5921554721 in words is "five billion, nine hundred twenty-one million, five hundred fifty-four thousand, seven hundred twenty-one".