2155104493 has 2 divisors, whose sum is σ = 2155104494. Its totient is φ = 2155104492.

The previous prime is 2155104481. The next prime is 2155104527. The reversal of 2155104493 is 3944015512.

It is an a-pointer prime, because the next prime (2155104527) can be obtained adding 2155104493 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2092330564 + 62773929 = 45742^2 + 7923^2 .

It is a cyclic number.

It is not a de Polignac number, because 2155104493 - 2⁵ = 2155104461 is a prime.

It is a super-3 number, since 3×2155104493³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2155104403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077552246 + 1077552247.

It is an arithmetic number, because the mean of its divisors is an integer number (1077552247).

Almost surely, 2^2155104493 is an apocalyptic number.

It is an amenable number.

2155104493 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155104493 is an equidigital number, since it uses as much as digits as its factorization.

2155104493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 2155104493 is about 46423.1030091699. The cubic root of 2155104493 is about 1291.6834965901.

The spelling of 2155104493 in words is "two billion, one hundred fifty-five million, one hundred four thousand, four hundred ninety-three".