55630144 has 28 divisors (see below), whose sum is σ = 110642400. Its totient is φ = 27751808.

The previous prime is 55630117. The next prime is 55630147. The reversal of 55630144 is 44103655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55630147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41517 + ... + 42835.

Almost surely, 2^55630144 is an apocalyptic number.

It is an amenable number.

55630144 is a deficient number, since it is larger than the sum of its proper divisors (55012256).

55630144 is a wasteful number, since it uses less digits than its factorization.

55630144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990 (or 1980 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 55630144 is about 7458.5617916593. The cubic root of 55630144 is about 381.7421027282.

Adding to 55630144 its reverse (44103655), we get a palindrome (99733799).

The spelling of 55630144 in words is "fifty-five million, six hundred thirty thousand, one hundred forty-four".