311431242043 has 4 divisors (see below), whose sum is σ = 311490308808. Its totient is φ = 311372175280.

The previous prime is 311431242029. The next prime is 311431242061. The reversal of 311431242043 is 340242134113.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 311431242043 - 2²⁹ = 310894371131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311431243043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29525473 + ... + 29536018.

It is an arithmetic number, because the mean of its divisors is an integer number (77872577202).

Almost surely, 2^311431242043 is an apocalyptic number.

311431242043 is a deficient number, since it is larger than the sum of its proper divisors (59066765).

311431242043 is an equidigital number, since it uses as much as digits as its factorization.

311431242043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59066764.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 311431242043 its reverse (340242134113), we get a palindrome (651673376156).

The spelling of 311431242043 in words is "three hundred eleven billion, four hundred thirty-one million, two hundred forty-two thousand, forty-three".