218855383550 has 24 divisors (see below), whose sum is σ = 411975491256. Its totient is φ = 86487427040.

The previous prime is 218855383541. The next prime is 218855383559. The reversal of 218855383550 is 55383558812.

It is an interprime number because it is at equal distance from previous prime (218855383541) and next prime (218855383559).

It is a super-2 number, since 2×218855383550² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 218855383492 and 218855383501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218855383559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26363969 + ... + 26372268.

It is an arithmetic number, because the mean of its divisors is an integer number (17165645469).

Almost surely, 2^218855383550 is an apocalyptic number.

218855383550 is a deficient number, since it is larger than the sum of its proper divisors (193120107706).

218855383550 is a wasteful number, since it uses less digits than its factorization.

218855383550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52736332 (or 52736327 counting only the distinct ones).

The product of its (nonzero) digits is 5760000, while the sum is 53.

The spelling of 218855383550 in words is "two hundred eighteen billion, eight hundred fifty-five million, three hundred eighty-three thousand, five hundred fifty".