55130444 has 24 divisors (see below), whose sum is σ = 99845760. Its totient is φ = 26614656.

The previous prime is 55130443. The next prime is 55130461. The reversal of 55130444 is 44403155.

It is not an unprimeable number, because it can be changed into a prime (55130443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18917 + ... + 21635.

It is an arithmetic number, because the mean of its divisors is an integer number (4160240).

Almost surely, 2^55130444 is an apocalyptic number.

It is an amenable number.

55130444 is a deficient number, since it is larger than the sum of its proper divisors (44715316).

55130444 is a wasteful number, since it uses less digits than its factorization.

55130444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2897 (or 2895 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 55130444 is about 7424.9878114378. The cubic root of 55130444 is about 380.5956586016.

Adding to 55130444 its reverse (44403155), we get a palindrome (99533599).

The spelling of 55130444 in words is "fifty-five million, one hundred thirty thousand, four hundred forty-four".