221013318 has 16 divisors (see below), whose sum is σ = 443749680. Its totient is φ = 73383936.

The previous prime is 221013283. The next prime is 221013319. The reversal of 221013318 is 813310122.

It is a junction number, because it is equal to n+sod(n) for n = 221013294 and 221013303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221013319) 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 7 ways as a sum of consecutive naturals, for example, 70123 + ... + 73206.

It is an arithmetic number, because the mean of its divisors is an integer number (27734355).

Almost surely, 2^221013318 is an apocalyptic number.

221013318 is an abundant number, since it is smaller than the sum of its proper divisors (222736362).

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

221013318 is a wasteful number, since it uses less digits than its factorization.

221013318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143591.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 221013318 is about 14866.5166733838. The cubic root of 221013318 is about 604.6065041351.

The spelling of 221013318 in words is "two hundred twenty-one million, thirteen thousand, three hundred eighteen".