55511444 has 12 divisors (see below), whose sum is σ = 97367424. Its totient is φ = 27692184.

The previous prime is 55511437. The next prime is 55511459. The reversal of 55511444 is 44411555.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13892 + ... + 17435.

It is an arithmetic number, because the mean of its divisors is an integer number (8113952).

Almost surely, 2^55511444 is an apocalyptic number.

It is an amenable number.

55511444 is a deficient number, since it is larger than the sum of its proper divisors (41855980).

55511444 is a wasteful number, since it uses less digits than its factorization.

55511444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31774 (or 31772 counting only the distinct ones).

The product of its digits is 8000, while the sum is 29.

The square root of 55511444 is about 7450.6002442756. The cubic root of 55511444 is about 381.4703971918.

Adding to 55511444 its reverse (44411555), we get a palindrome (99922999).

It can be divided in two parts, 55511 and 444, that added together give a palindrome (55955).

The spelling of 55511444 in words is "fifty-five million, five hundred eleven thousand, four hundred forty-four".