55231144 has 16 divisors (see below), whose sum is σ = 103648500. Its totient is φ = 27591552.

The previous prime is 55231103. The next prime is 55231151. The reversal of 55231144 is 44113255.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 55204900 + 26244 = 7430^2 + 162^2 .

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 10164 + ... + 14620.

Almost surely, 2^55231144 is an apocalyptic number.

It is an amenable number.

55231144 is a deficient number, since it is larger than the sum of its proper divisors (48417356).

55231144 is a wasteful number, since it uses less digits than its factorization.

55231144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6012 (or 6008 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 55231144 is about 7431.7658735996. The cubic root of 55231144 is about 380.8272467440.

Adding to 55231144 its reverse (44113255), we get a palindrome (99344399).

The spelling of 55231144 in words is "fifty-five million, two hundred thirty-one thousand, one hundred forty-four".