55891523 has 2 divisors, whose sum is σ = 55891524. Its totient is φ = 55891522.

The previous prime is 55891519. The next prime is 55891567. The reversal of 55891523 is 32519855.

55891523 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 55891523 - 2² = 55891519 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (55891123) 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, 27945761 + 27945762.

It is an arithmetic number, because the mean of its divisors is an integer number (27945762).

Almost surely, 2^55891523 is an apocalyptic number.

55891523 is a deficient number, since it is larger than the sum of its proper divisors (1).

55891523 is an equidigital number, since it uses as much as digits as its factorization.

55891523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54000, while the sum is 38.

The square root of 55891523 is about 7476.0633357403. The cubic root of 55891523 is about 382.3390423067.

The spelling of 55891523 in words is "fifty-five million, eight hundred ninety-one thousand, five hundred twenty-three".