55551493 has 2 divisors, whose sum is σ = 55551494. Its totient is φ = 55551492.

The previous prime is 55551479. The next prime is 55551547. The reversal of 55551493 is 39415555.

55551493 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 can be written as a sum of positive squares in only one way, i.e., 37970244 + 17581249 = 6162^2 + 4193^2 .

It is a cyclic number.

It is not a de Polignac number, because 55551493 - 2⁹ = 55550981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55551403) 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, 27775746 + 27775747.

It is an arithmetic number, because the mean of its divisors is an integer number (27775747).

Almost surely, 2^55551493 is an apocalyptic number.

It is an amenable number.

55551493 is a deficient number, since it is larger than the sum of its proper divisors (1).

55551493 is an equidigital number, since it uses as much as digits as its factorization.

55551493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67500, while the sum is 37.

The square root of 55551493 is about 7453.2873955054. The cubic root of 55551493 is about 381.5621130273.

The spelling of 55551493 in words is "fifty-five million, five hundred fifty-one thousand, four hundred ninety-three".