54118755221 has 2 divisors, whose sum is σ = 54118755222. Its totient is φ = 54118755220.

The previous prime is 54118755209. The next prime is 54118755227. The reversal of 54118755221 is 12255781145.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52778170225 + 1340584996 = 229735^2 + 36614^2 .

It is a cyclic number.

It is not a de Polignac number, because 54118755221 - 2²⁶ = 54051646357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54118755227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27059377610 + 27059377611.

It is an arithmetic number, because the mean of its divisors is an integer number (27059377611).

Almost surely, 2^54118755221 is an apocalyptic number.

It is an amenable number.

54118755221 is a deficient number, since it is larger than the sum of its proper divisors (1).

54118755221 is an equidigital number, since it uses as much as digits as its factorization.

54118755221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112000, while the sum is 41.

The spelling of 54118755221 in words is "fifty-four billion, one hundred eighteen million, seven hundred fifty-five thousand, two hundred twenty-one".