54120213517 has 2 divisors, whose sum is σ = 54120213518. Its totient is φ = 54120213516.

The previous prime is 54120213493. The next prime is 54120213583. The reversal of 54120213517 is 71531202145.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50476159561 + 3644053956 = 224669^2 + 60366^2 .

It is a cyclic number.

It is not a de Polignac number, because 54120213517 - 2¹⁵ = 54120180749 is a prime.

It is a super-2 number, since 2×54120213517² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54120217517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27060106758 + 27060106759.

It is an arithmetic number, because the mean of its divisors is an integer number (27060106759).

Almost surely, 2^54120213517 is an apocalyptic number.

It is an amenable number.

54120213517 is a deficient number, since it is larger than the sum of its proper divisors (1).

54120213517 is an equidigital number, since it uses as much as digits as its factorization.

54120213517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 31.

The spelling of 54120213517 in words is "fifty-four billion, one hundred twenty million, two hundred thirteen thousand, five hundred seventeen".