54540512521 has 4 divisors (see below), whose sum is σ = 59498740944. Its totient is φ = 49582284100.

The previous prime is 54540512519. The next prime is 54540512561. The reversal of 54540512521 is 12521504545.

54540512521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 54540512521 - 2¹ = 54540512519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54540512561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2479114195 + ... + 2479114216.

It is an arithmetic number, because the mean of its divisors is an integer number (14874685236).

Almost surely, 2^54540512521 is an apocalyptic number.

It is an amenable number.

54540512521 is a deficient number, since it is larger than the sum of its proper divisors (4958228423).

54540512521 is a wasteful number, since it uses less digits than its factorization.

54540512521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4958228422.

The product of its (nonzero) digits is 40000, while the sum is 34.

The spelling of 54540512521 in words is "fifty-four billion, five hundred forty million, five hundred twelve thousand, five hundred twenty-one".