315260221 has 4 divisors (see below), whose sum is σ = 315478944. Its totient is φ = 315041500.

The previous prime is 315260213. The next prime is 315260227. The reversal of 315260221 is 122062513.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122062513 = 359 ⋅340007.

It is a cyclic number.

It is not a de Polignac number, because 315260221 - 2³ = 315260213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 315260192 and 315260201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315260227) 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 3 ways as a sum of consecutive naturals, for example, 107185 + ... + 110086.

It is an arithmetic number, because the mean of its divisors is an integer number (78869736).

Almost surely, 2^315260221 is an apocalyptic number.

It is an amenable number.

315260221 is a deficient number, since it is larger than the sum of its proper divisors (218723).

315260221 is a wasteful number, since it uses less digits than its factorization.

315260221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218722.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 315260221 is about 17755.5687320908. The cubic root of 315260221 is about 680.5965216825.

The spelling of 315260221 in words is "three hundred fifteen million, two hundred sixty thousand, two hundred twenty-one".