55385573 has 2 divisors, whose sum is σ = 55385574. Its totient is φ = 55385572.

The previous prime is 55385569. The next prime is 55385579. The reversal of 55385573 is 37558355.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55383364 + 2209 = 7442^2 + 47^2 .

It is a cyclic number.

It is not a de Polignac number, because 55385573 - 2² = 55385569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55385573.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55385579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27692786 + 27692787.

It is an arithmetic number, because the mean of its divisors is an integer number (27692787).

Almost surely, 2^55385573 is an apocalyptic number.

It is an amenable number.

55385573 is a deficient number, since it is larger than the sum of its proper divisors (1).

55385573 is an equidigital number, since it uses as much as digits as its factorization.

55385573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 315000, while the sum is 41.

The square root of 55385573 is about 7442.1484129249. The cubic root of 55385573 is about 381.1818536983.

It can be divided in two parts, 5538 and 5573, that added together give a palindrome (11111).

The spelling of 55385573 in words is "fifty-five million, three hundred eighty-five thousand, five hundred seventy-three".