54188447021 has 2 divisors, whose sum is σ = 54188447022. Its totient is φ = 54188447020.

The previous prime is 54188447009. The next prime is 54188447041. The reversal of 54188447021 is 12074488145.

54188447021 is digitally balanced in base 2, 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., 53921484100 + 266962921 = 232210^2 + 16339^2 .

It is a cyclic number.

It is not a de Polignac number, because 54188447021 - 2⁶ = 54188446957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54188447041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27094223510 + 27094223511.

It is an arithmetic number, because the mean of its divisors is an integer number (27094223511).

Almost surely, 2^54188447021 is an apocalyptic number.

It is an amenable number.

54188447021 is a deficient number, since it is larger than the sum of its proper divisors (1).

54188447021 is an equidigital number, since it uses as much as digits as its factorization.

54188447021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 286720, while the sum is 44.

The spelling of 54188447021 in words is "fifty-four billion, one hundred eighty-eight million, four hundred forty-seven thousand, twenty-one".