313121145 has 8 divisors (see below), whose sum is σ = 500993856. Its totient is φ = 166997936.

The previous prime is 313121143. The next prime is 313121153. The reversal of 313121145 is 541121313.

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

It is a cyclic number.

It is not a de Polignac number, because 313121145 - 2¹ = 313121143 is a prime.

It is a super-2 number, since 2×313121145² = 196089702892222050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (313121143) 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, 10437357 + ... + 10437386.

It is an arithmetic number, because the mean of its divisors is an integer number (62624232).

Almost surely, 2^313121145 is an apocalyptic number.

It is an amenable number.

313121145 is a deficient number, since it is larger than the sum of its proper divisors (187872711).

313121145 is a wasteful number, since it uses less digits than its factorization.

313121145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20874751.

The product of its digits is 360, while the sum is 21.

The square root of 313121145 is about 17695.2294418581. The cubic root of 313121145 is about 679.0537190992.

Adding to 313121145 its reverse (541121313), we get a palindrome (854242458).

The spelling of 313121145 in words is "three hundred thirteen million, one hundred twenty-one thousand, one hundred forty-five".