55434187 has 2 divisors, whose sum is σ = 55434188. Its totient is φ = 55434186.

The previous prime is 55434157. The next prime is 55434193. The reversal of 55434187 is 78143455.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55434187 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55434157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27717093 + 27717094.

It is an arithmetic number, because the mean of its divisors is an integer number (27717094).

Almost surely, 2^55434187 is an apocalyptic number.

55434187 is a deficient number, since it is larger than the sum of its proper divisors (1).

55434187 is an equidigital number, since it uses as much as digits as its factorization.

55434187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67200, while the sum is 37.

The square root of 55434187 is about 7445.4138232875. The cubic root of 55434187 is about 381.2933469660.

It can be divided in two parts, 5543 and 4187, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 55434187 in words is "fifty-five million, four hundred thirty-four thousand, one hundred eighty-seven".