31311234243 has 24 divisors (see below), whose sum is σ = 47666782800. Its totient is φ = 19750984704.

The previous prime is 31311234239. The next prime is 31311234271. The reversal of 31311234243 is 34243211313.

It is a happy number.

31311234243 is a `hidden beast` number, since 3 + 1 + 311 + 2 + 342 + 4 + 3 = 666.

It is not a de Polignac number, because 31311234243 - 2² = 31311234239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31311234443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25171 + ... + 251507.

It is an arithmetic number, because the mean of its divisors is an integer number (1986115950).

Almost surely, 2^31311234243 is an apocalyptic number.

31311234243 is a deficient number, since it is larger than the sum of its proper divisors (16355548557).

31311234243 is a wasteful number, since it uses less digits than its factorization.

31311234243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227171 (or 227168 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

Adding to 31311234243 its reverse (34243211313), we get a palindrome (65554445556).

The spelling of 31311234243 in words is "thirty-one billion, three hundred eleven million, two hundred thirty-four thousand, two hundred forty-three".