55311718 has 16 divisors (see below), whose sum is σ = 103440384. Its totient is φ = 21549960.

The previous prime is 55311703. The next prime is 55311743. The reversal of 55311718 is 81711355.

It is a super-2 number, since 2×55311718² = 6118772296223048, 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 55311718.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179430 + ... + 179737.

It is an arithmetic number, because the mean of its divisors is an integer number (6465024).

Almost surely, 2^55311718 is an apocalyptic number.

55311718 is a deficient number, since it is larger than the sum of its proper divisors (48128666).

55311718 is a wasteful number, since it uses less digits than its factorization.

55311718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359187.

The product of its digits is 4200, while the sum is 31.

The square root of 55311718 is about 7437.1848168511. The cubic root of 55311718 is about 381.0123468098.

The spelling of 55311718 in words is "fifty-five million, three hundred eleven thousand, seven hundred eighteen".