55318032197 has 2 divisors, whose sum is σ = 55318032198. Its totient is φ = 55318032196.

The previous prime is 55318032193. The next prime is 55318032233. The reversal of 55318032197 is 79123081355.

55318032197 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., 55303047556 + 14984641 = 235166^2 + 3871^2 .

It is a cyclic number.

It is not a de Polignac number, because 55318032197 - 2² = 55318032193 is a prime.

It is a super-2 number, since 2×55318032197² (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 (55318032191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27659016098 + 27659016099.

It is an arithmetic number, because the mean of its divisors is an integer number (27659016099).

Almost surely, 2^55318032197 is an apocalyptic number.

It is an amenable number.

55318032197 is a deficient number, since it is larger than the sum of its proper divisors (1).

55318032197 is an equidigital number, since it uses as much as digits as its factorization.

55318032197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 55318032197 in words is "fifty-five billion, three hundred eighteen million, thirty-two thousand, one hundred ninety-seven".