316316221 has 8 divisors (see below), whose sum is σ = 342820184. Its totient is φ = 290122560.

The previous prime is 316316201. The next prime is 316316239. The reversal of 316316221 is 122613613.

It can be written as a sum of positive squares in 4 ways, for example, as 3556996 + 312759225 = 1886^2 + 17685^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-316316221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (316316201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75450 + ... + 79531.

It is an arithmetic number, because the mean of its divisors is an integer number (42852523).

Almost surely, 2^316316221 is an apocalyptic number.

It is an amenable number.

316316221 is a deficient number, since it is larger than the sum of its proper divisors (26503963).

316316221 is a wasteful number, since it uses less digits than its factorization.

316316221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155151.

The product of its digits is 1296, while the sum is 25.

The square root of 316316221 is about 17785.2810211141. The cubic root of 316316221 is about 681.3555866307.

Adding to 316316221 its reverse (122613613), we get a palindrome (438929834).

The spelling of 316316221 in words is "three hundred sixteen million, three hundred sixteen thousand, two hundred twenty-one".