55459181 has 2 divisors, whose sum is σ = 55459182. Its totient is φ = 55459180.

The previous prime is 55459171. The next prime is 55459199. The reversal of 55459181 is 18195455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40513225 + 14945956 = 6365^2 + 3866^2 .

It is a cyclic number.

It is not a de Polignac number, because 55459181 - 2¹⁰ = 55458157 is a prime.

It is a super-2 number, since 2×55459181² = 6151441514381522, which contains 22 as substring.

It is equal to p_3307997 and since 55459181 and 3307997 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55459171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27729590 + 27729591.

It is an arithmetic number, because the mean of its divisors is an integer number (27729591).

Almost surely, 2^55459181 is an apocalyptic number.

It is an amenable number.

55459181 is a deficient number, since it is larger than the sum of its proper divisors (1).

55459181 is an equidigital number, since it uses as much as digits as its factorization.

55459181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36000, while the sum is 38.

The square root of 55459181 is about 7447.0921170615. The cubic root of 55459181 is about 381.3506438226.

The spelling of 55459181 in words is "fifty-five million, four hundred fifty-nine thousand, one hundred eighty-one".