54155122321 has 2 divisors, whose sum is σ = 54155122322. Its totient is φ = 54155122320.

The previous prime is 54155122313. The next prime is 54155122433. The reversal of 54155122321 is 12322155145.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53576046225 + 579076096 = 231465^2 + 24064^2 .

It is a cyclic number.

It is not a de Polignac number, because 54155122321 - 2³ = 54155122313 is a prime.

It is not a weakly prime, because it can be changed into another prime (54155122921) 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, 27077561160 + 27077561161.

It is an arithmetic number, because the mean of its divisors is an integer number (27077561161).

Almost surely, 2^54155122321 is an apocalyptic number.

It is an amenable number.

54155122321 is a deficient number, since it is larger than the sum of its proper divisors (1).

54155122321 is an equidigital number, since it uses as much as digits as its factorization.

54155122321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12000, while the sum is 31.

Adding to 54155122321 its reverse (12322155145), we get a palindrome (66477277466).

The spelling of 54155122321 in words is "fifty-four billion, one hundred fifty-five million, one hundred twenty-two thousand, three hundred twenty-one".