55540318 has 16 divisors (see below), whose sum is σ = 85570560. Its totient is φ = 27027000.

The previous prime is 55540301. The next prime is 55540319. The reversal of 55540318 is 81304555.

It is a super-2 number, since 2×55540318² = 6169453847082248, 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 55540318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55540319) by changing a digit.

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, 8743 + ... + 13693.

It is an arithmetic number, because the mean of its divisors is an integer number (5348160).

Almost surely, 2^55540318 is an apocalyptic number.

55540318 is a deficient number, since it is larger than the sum of its proper divisors (30030242).

55540318 is a wasteful number, since it uses less digits than its factorization.

55540318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5103.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 55540318 is about 7452.5376885998. The cubic root of 55540318 is about 381.5365257008.

The spelling of 55540318 in words is "fifty-five million, five hundred forty thousand, three hundred eighteen".