55418444 has 12 divisors (see below), whose sum is σ = 97049064. Its totient is φ = 27690144.

The previous prime is 55418437. The next prime is 55418479. The reversal of 55418444 is 44481455.

It is a super-2 number, since 2×55418444² = 6142407870762272, which contains 22 as substring.

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, 3272 + ... + 11024.

It is an arithmetic number, because the mean of its divisors is an integer number (8087422).

Almost surely, 2^55418444 is an apocalyptic number.

It is an amenable number.

55418444 is a deficient number, since it is larger than the sum of its proper divisors (41630620).

55418444 is a wasteful number, since it uses less digits than its factorization.

55418444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9544 (or 9542 counting only the distinct ones).

The product of its digits is 51200, while the sum is 35.

The square root of 55418444 is about 7444.3565202105. The cubic root of 55418444 is about 381.2572484871.

Adding to 55418444 its reverse (44481455), we get a palindrome (99899899).

The spelling of 55418444 in words is "fifty-five million, four hundred eighteen thousand, four hundred forty-four".