313242221 has 16 divisors (see below), whose sum is σ = 347442048. Its totient is φ = 280896000.

The previous prime is 313242157. The next prime is 313242239. The reversal of 313242221 is 122242313.

It is a cyclic number.

It is not a de Polignac number, because 313242221 - 2⁶ = 313242157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 313242193 and 313242202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313242121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108446 + ... + 111296.

It is an arithmetic number, because the mean of its divisors is an integer number (21715128).

Almost surely, 2^313242221 is an apocalyptic number.

It is an amenable number.

313242221 is a deficient number, since it is larger than the sum of its proper divisors (34199827).

313242221 is a wasteful number, since it uses less digits than its factorization.

313242221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3172.

The product of its digits is 576, while the sum is 20.

The square root of 313242221 is about 17698.6502592712. The cubic root of 313242221 is about 679.1412321002.

Adding to 313242221 its reverse (122242313), we get a palindrome (435484534).

The spelling of 313242221 in words is "three hundred thirteen million, two hundred forty-two thousand, two hundred twenty-one".