55055387 has 2 divisors, whose sum is σ = 55055388. Its totient is φ = 55055386.

The previous prime is 55055321. The next prime is 55055417. The reversal of 55055387 is 78355055.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55055387 - 2¹² = 55051291 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55055387.

It is not a weakly prime, because it can be changed into another prime (55055587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27527693 + 27527694.

It is an arithmetic number, because the mean of its divisors is an integer number (27527694).

Almost surely, 2^55055387 is an apocalyptic number.

55055387 is a deficient number, since it is larger than the sum of its proper divisors (1).

55055387 is an equidigital number, since it uses as much as digits as its factorization.

55055387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105000, while the sum is 38.

The square root of 55055387 is about 7419.9317382305. The cubic root of 55055387 is about 380.4228602956.

The spelling of 55055387 in words is "fifty-five million, fifty-five thousand, three hundred eighty-seven".