311131342 has 4 divisors (see below), whose sum is σ = 466697016. Its totient is φ = 155565670.

The previous prime is 311131321. The next prime is 311131361. The reversal of 311131342 is 243131113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 243131113 = 1237 ⋅196549.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77782834 + ... + 77782837.

It is an arithmetic number, because the mean of its divisors is an integer number (116674254).

Almost surely, 2^311131342 is an apocalyptic number.

311131342 is a deficient number, since it is larger than the sum of its proper divisors (155565674).

311131342 is a wasteful number, since it uses less digits than its factorization.

311131342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155565673.

The product of its digits is 216, while the sum is 19.

The square root of 311131342 is about 17638.9155562353. The cubic root of 311131342 is about 677.6122584642.

Adding to 311131342 its reverse (243131113), we get a palindrome (554262455).

It can be divided in two parts, 3111 and 31342, that added together give a triangular number (34453 = T₂₆₂).

The spelling of 311131342 in words is "three hundred eleven million, one hundred thirty-one thousand, three hundred forty-two".