Search a number
55655516 = 2271987697

55655516 has 12 divisors (see below), whose sum is σ = 111311088. Its totient is φ = 23852352.

The previous prime is 55655513. The next prime is 55655519. The reversal of 55655516 is 61555655.

55655516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55655513) and next prime (55655519).

55655516 is an admirable number.

It is a super-2 number, since 2×556555162 = 6195072922452512, 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 55655516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55655513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 993821 + ... + 993876.

It is an arithmetic number, because the mean of its divisors is an integer number (9275924).

Almost surely, 255655516 is an apocalyptic number.

It is an amenable number.

55655516 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55655516 is a wasteful number, since it uses less digits than its factorization.

55655516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987708 (or 1987706 counting only the distinct ones).

The product of its digits is 112500, while the sum is 38.

The square root of 55655516 is about 7460.2624618709. The cubic root of 55655516 is about 381.8001293533.

The spelling of 55655516 in words is "fifty-five million, six hundred fifty-five thousand, five hundred sixteen".

Divisors: 1 2 4 7 14 28 1987697 3975394 7950788 13913879 27827758 55655516