313021145 has 16 divisors (see below), whose sum is σ = 392539392. Its totient is φ = 239173440.

The previous prime is 313021141. The next prime is 313021169. The reversal of 313021145 is 541120313.

It is not a de Polignac number, because 313021145 - 2² = 313021141 is a prime.

It is a super-2 number, since 2×313021145² = 195964474434222050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313021141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96500 + ... + 99690.

It is an arithmetic number, because the mean of its divisors is an integer number (24533712).

Almost surely, 2^313021145 is an apocalyptic number.

It is an amenable number.

313021145 is a deficient number, since it is larger than the sum of its proper divisors (79518247).

313021145 is a wasteful number, since it uses less digits than its factorization.

313021145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4072.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 313021145 is about 17692.4035958939. The cubic root of 313021145 is about 678.9814226913.

Adding to 313021145 its reverse (541120313), we get a palindrome (854141458).

The spelling of 313021145 in words is "three hundred thirteen million, twenty-one thousand, one hundred forty-five".