54520021487 has 2 divisors, whose sum is σ = 54520021488. Its totient is φ = 54520021486.

The previous prime is 54520021471. The next prime is 54520021529. The reversal of 54520021487 is 78412002545.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54520021487 - 2⁴ = 54520021471 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54520021487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54520021187) 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, 27260010743 + 27260010744.

It is an arithmetic number, because the mean of its divisors is an integer number (27260010744).

Almost surely, 2^54520021487 is an apocalyptic number.

54520021487 is a deficient number, since it is larger than the sum of its proper divisors (1).

54520021487 is an equidigital number, since it uses as much as digits as its factorization.

54520021487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 89600, while the sum is 38.

The spelling of 54520021487 in words is "fifty-four billion, five hundred twenty million, twenty-one thousand, four hundred eighty-seven".