55718290 has 16 divisors (see below), whose sum is σ = 100911168. Its totient is φ = 22149936.

The previous prime is 55718287. The next prime is 55718291. The reversal of 55718290 is 9281755.

It is not an unprimeable number, because it can be changed into a prime (55718291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15462 + ... + 18721.

It is an arithmetic number, because the mean of its divisors is an integer number (6306948).

Almost surely, 2^55718290 is an apocalyptic number.

55718290 is a deficient number, since it is larger than the sum of its proper divisors (45192878).

55718290 is a wasteful number, since it uses less digits than its factorization.

55718290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34353.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 55718290 is about 7464.4685008378. The cubic root of 55718290 is about 381.9436198692.

It can be divided in two parts, 5571 and 8290, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 55718290 in words is "fifty-five million, seven hundred eighteen thousand, two hundred ninety".