311431234 has 4 divisors (see below), whose sum is σ = 467146854. Its totient is φ = 155715616.

The previous prime is 311431231. The next prime is 311431243. The reversal of 311431234 is 432134113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 432134113 = 59 ⋅7324307.

It can be written as a sum of positive squares in only one way, i.e., 280462009 + 30969225 = 16747^2 + 5565^2 .

It is not an unprimeable number, because it can be changed into a prime (311431231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77857807 + ... + 77857810.

Almost surely, 2^311431234 is an apocalyptic number.

311431234 is a deficient number, since it is larger than the sum of its proper divisors (155715620).

311431234 is a wasteful number, since it uses less digits than its factorization.

311431234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155715619.

The product of its digits is 864, while the sum is 22.

The square root of 311431234 is about 17647.4143715163. The cubic root of 311431234 is about 677.8298999262.

Adding to 311431234 its reverse (432134113), we get a palindrome (743565347).

The spelling of 311431234 in words is "three hundred eleven million, four hundred thirty-one thousand, two hundred thirty-four".