311312142 has 24 divisors (see below), whose sum is σ = 687238344. Its totient is φ = 101812464.

The previous prime is 311312101. The next prime is 311312171. The reversal of 311312142 is 241213113.

311312142 is a `hidden beast` number, since 311 + 312 + 1 + 42 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162208 + ... + 164115.

It is an arithmetic number, because the mean of its divisors is an integer number (28634931).

Almost surely, 2^311312142 is an apocalyptic number.

311312142 is an abundant number, since it is smaller than the sum of its proper divisors (375926202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311312142 is a wasteful number, since it uses less digits than its factorization.

311312142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326384 (or 326381 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 311312142 is about 17644.0398435279. The cubic root of 311312142 is about 677.7434876876.

Adding to 311312142 its reverse (241213113), we get a palindrome (552525255).

The spelling of 311312142 in words is "three hundred eleven million, three hundred twelve thousand, one hundred forty-two".