55581023 has 16 divisors (see below), whose sum is σ = 61020000. Its totient is φ = 50424192.

The previous prime is 55581017. The next prime is 55581083. The reversal of 55581023 is 32018555.

55581023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55581023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55581083) 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 in 15 ways as a sum of consecutive naturals, for example, 81761 + ... + 82437.

It is an arithmetic number, because the mean of its divisors is an integer number (3813750).

Almost surely, 2^55581023 is an apocalyptic number.

55581023 is a deficient number, since it is larger than the sum of its proper divisors (5438977).

55581023 is a wasteful number, since it uses less digits than its factorization.

55581023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 55581023 is about 7455.2681373643. The cubic root of 55581023 is about 381.6297111701.

Adding to 55581023 its reverse (32018555), we get a palindrome (87599578).

The spelling of 55581023 in words is "fifty-five million, five hundred eighty-one thousand, twenty-three".