311231442 has 8 divisors (see below), whose sum is σ = 622462896. Its totient is φ = 103743812.

The previous prime is 311231429. The next prime is 311231443. The reversal of 311231442 is 244132113.

311231442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

311231442 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (311231443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25935948 + ... + 25935959.

It is an arithmetic number, because the mean of its divisors is an integer number (77807862).

Almost surely, 2^311231442 is an apocalyptic number.

311231442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

311231442 is a wasteful number, since it uses less digits than its factorization.

311231442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51871912.

The product of its digits is 576, while the sum is 21.

The square root of 311231442 is about 17641.7528040725. The cubic root of 311231442 is about 677.6849198616.

Adding to 311231442 its reverse (244132113), we get a palindrome (555363555).

The spelling of 311231442 in words is "three hundred eleven million, two hundred thirty-one thousand, four hundred forty-two".