311142923 has 32 divisors (see below), whose sum is σ = 391843200. Its totient is φ = 240537600.

The previous prime is 311142889. The next prime is 311142989. The reversal of 311142923 is 329241113.

It is a cyclic number.

It is not a de Polignac number, because 311142923 - 2²⁰ = 310094347 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311142892 and 311142901.

It is not an unprimeable number, because it can be changed into a prime (311142323) 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 31 ways as a sum of consecutive naturals, for example, 891353 + ... + 891701.

It is an arithmetic number, because the mean of its divisors is an integer number (12245100).

Almost surely, 2^311142923 is an apocalyptic number.

311142923 is a deficient number, since it is larger than the sum of its proper divisors (80700277).

311142923 is a wasteful number, since it uses less digits than its factorization.

311142923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567.

The product of its digits is 1296, while the sum is 26.

The square root of 311142923 is about 17639.2438329992. The cubic root of 311142923 is about 677.6206657713.

The spelling of 311142923 in words is "three hundred eleven million, one hundred forty-two thousand, nine hundred twenty-three".