221017316 has 12 divisors (see below), whose sum is σ = 416532732. Its totient is φ = 102007968.

The previous prime is 221017301. The next prime is 221017331. The reversal of 221017316 is 613710122.

221017316 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 (221017301) and next prime (221017331).

It can be written as a sum of positive squares in 2 ways, for example, as 89226916 + 131790400 = 9446^2 + 11480^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221017291 and 221017300.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2125115 + ... + 2125218.

It is an arithmetic number, because the mean of its divisors is an integer number (34711061).

Almost surely, 2^221017316 is an apocalyptic number.

221017316 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

221017316 is a deficient number, since it is larger than the sum of its proper divisors (195515416).

221017316 is a wasteful number, since it uses less digits than its factorization.

221017316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4250350 (or 4250348 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 221017316 is about 14866.6511360158. The cubic root of 221017316 is about 604.6101497710.

Adding to 221017316 its reverse (613710122), we get a palindrome (834727438).

The spelling of 221017316 in words is "two hundred twenty-one million, seventeen thousand, three hundred sixteen".