55148987 has 2 divisors, whose sum is σ = 55148988. Its totient is φ = 55148986.

The previous prime is 55148983. The next prime is 55148993. The reversal of 55148987 is 78984155.

55148987 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 is a cyclic number.

It is not a de Polignac number, because 55148987 - 2² = 55148983 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55148983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27574493 + 27574494.

It is an arithmetic number, because the mean of its divisors is an integer number (27574494).

Almost surely, 2^55148987 is an apocalyptic number.

55148987 is a deficient number, since it is larger than the sum of its proper divisors (1).

55148987 is an equidigital number, since it uses as much as digits as its factorization.

55148987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 47.

The square root of 55148987 is about 7426.2363953755. The cubic root of 55148987 is about 380.6383246477.

The spelling of 55148987 in words is "fifty-five million, one hundred forty-eight thousand, nine hundred eighty-seven".