56198161 has 2 divisors, whose sum is σ = 56198162. Its totient is φ = 56198160.

The previous prime is 56198159. The next prime is 56198231. The reversal of 56198161 is 16189165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55353600 + 844561 = 7440^2 + 919^2 .

It is a cyclic number.

It is not a de Polignac number, because 56198161 - 2¹ = 56198159 is a prime.

Together with 56198159, it forms a pair of twin primes.

It is equal to p_3349549 and since 56198161 and 3349549 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56198161.

It is not a weakly prime, because it can be changed into another prime (56198761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28099080 + 28099081.

It is an arithmetic number, because the mean of its divisors is an integer number (28099081).

Almost surely, 2^56198161 is an apocalyptic number.

It is an amenable number.

56198161 is a deficient number, since it is larger than the sum of its proper divisors (1).

56198161 is an equidigital number, since it uses as much as digits as its factorization.

56198161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 37.

The square root of 56198161 is about 7496.5432700679. The cubic root of 56198161 is about 383.0369771624.

The spelling of 56198161 in words is "fifty-six million, one hundred ninety-eight thousand, one hundred sixty-one".