55051687 has 2 divisors, whose sum is σ = 55051688. Its totient is φ = 55051686.

The previous prime is 55051681. The next prime is 55051727. The reversal of 55051687 is 78615055.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55051687 - 2¹¹ = 55049639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55051681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27525843 + 27525844.

It is an arithmetic number, because the mean of its divisors is an integer number (27525844).

Almost surely, 2^55051687 is an apocalyptic number.

55051687 is a deficient number, since it is larger than the sum of its proper divisors (1).

55051687 is an equidigital number, since it uses as much as digits as its factorization.

55051687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42000, while the sum is 37.

The square root of 55051687 is about 7419.6824056020. The cubic root of 55051687 is about 380.4143379923.

The spelling of 55051687 in words is "fifty-five million, fifty-one thousand, six hundred eighty-seven".