55198213181 has 2 divisors, whose sum is σ = 55198213182. Its totient is φ = 55198213180.

The previous prime is 55198213177. The next prime is 55198213253. The reversal of 55198213181 is 18131289155.

55198213181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41618040025 + 13580173156 = 204005^2 + 116534^2 .

It is a cyclic number.

It is not a de Polignac number, because 55198213181 - 2² = 55198213177 is a prime.

It is a super-2 number, since 2×55198213181² (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 (55198213141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27599106590 + 27599106591.

It is an arithmetic number, because the mean of its divisors is an integer number (27599106591).

Almost surely, 2^55198213181 is an apocalyptic number.

It is an amenable number.

55198213181 is a deficient number, since it is larger than the sum of its proper divisors (1).

55198213181 is an equidigital number, since it uses as much as digits as its factorization.

55198213181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 44.

The spelling of 55198213181 in words is "fifty-five billion, one hundred ninety-eight million, two hundred thirteen thousand, one hundred eighty-one".