55118313 has 20 divisors (see below), whose sum is σ = 82572820. Its totient is φ = 36640512.

The previous prime is 55118269. The next prime is 55118321. The reversal of 55118313 is 31381155.

It can be written as a sum of positive squares in 2 ways, for example, as 30437289 + 24681024 = 5517^2 + 4968^2 .

It is not a de Polignac number, because 55118313 - 2⁶ = 55118249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55118353) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 36273 + ... + 37761.

It is an arithmetic number, because the mean of its divisors is an integer number (4128641).

Almost surely, 2^55118313 is an apocalyptic number.

It is an amenable number.

55118313 is a deficient number, since it is larger than the sum of its proper divisors (27454507).

55118313 is a wasteful number, since it uses less digits than its factorization.

55118313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1958 (or 1949 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 55118313 is about 7424.1708627967. The cubic root of 55118313 is about 380.5677409074.

Adding to 55118313 its reverse (31381155), we get a palindrome (86499468).

It can be divided in two parts, 5511 and 8313, that added together give a cube (13824 = 24³).

The spelling of 55118313 in words is "fifty-five million, one hundred eighteen thousand, three hundred thirteen".