311121345 has 32 divisors (see below), whose sum is σ = 533498112. Its totient is φ = 154420992.

The previous prime is 311121323. The next prime is 311121353. The reversal of 311121345 is 543121113.

It is not a de Polignac number, because 311121345 - 2⁶ = 311121281 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 579 + ... + 24951.

It is an arithmetic number, because the mean of its divisors is an integer number (16671816).

Almost surely, 2^311121345 is an apocalyptic number.

It is an amenable number.

311121345 is a deficient number, since it is larger than the sum of its proper divisors (222376767).

311121345 is a wasteful number, since it uses less digits than its factorization.

311121345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24441.

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

The square root of 311121345 is about 17638.6321748598. The cubic root of 311121345 is about 677.6050009051.

Adding to 311121345 its reverse (543121113), we get a palindrome (854242458).

The spelling of 311121345 in words is "three hundred eleven million, one hundred twenty-one thousand, three hundred forty-five".