55811444 has 12 divisors (see below), whose sum is σ = 105183204. Its totient is φ = 25759104.

The previous prime is 55811443. The next prime is 55811449. The reversal of 55811444 is 44411855.

It can be written as a sum of positive squares in 2 ways, for example, as 38588944 + 17222500 = 6212^2 + 4150^2 .

It is a super-2 number, since 2×55811444² = 6229834562730272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55811444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55811443) 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, 536597 + ... + 536700.

It is an arithmetic number, because the mean of its divisors is an integer number (8765267).

Almost surely, 2^55811444 is an apocalyptic number.

It is an amenable number.

55811444 is a deficient number, since it is larger than the sum of its proper divisors (49371760).

55811444 is a wasteful number, since it uses less digits than its factorization.

55811444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073314 (or 1073312 counting only the distinct ones).

The product of its digits is 12800, while the sum is 32.

The square root of 55811444 is about 7470.7057230224. The cubic root of 55811444 is about 382.1563553172.

The spelling of 55811444 in words is "fifty-five million, eight hundred eleven thousand, four hundred forty-four".