54259815121 has 4 divisors (see below), whose sum is σ = 54757611700. Its totient is φ = 53762018544.

The previous prime is 54259815109. The next prime is 54259815139. The reversal of 54259815121 is 12151895245.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25593600400 + 28666214721 = 159980^2 + 169311^2 .

It is a cyclic number.

It is not a de Polignac number, because 54259815121 - 2²⁵ = 54226260689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54259815521) 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, 248898126 + ... + 248898343.

It is an arithmetic number, because the mean of its divisors is an integer number (13689402925).

Almost surely, 2^54259815121 is an apocalyptic number.

It is an amenable number.

54259815121 is a deficient number, since it is larger than the sum of its proper divisors (497796579).

54259815121 is a wasteful number, since it uses less digits than its factorization.

54259815121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497796578.

The product of its digits is 144000, while the sum is 43.

The spelling of 54259815121 in words is "fifty-four billion, two hundred fifty-nine million, eight hundred fifteen thousand, one hundred twenty-one".