231311413331 has 4 divisors (see below), whose sum is σ = 233557155312. Its totient is φ = 229065671352.

The previous prime is 231311413327. The next prime is 231311413337. The reversal of 231311413331 is 133314113132.

It is a happy number.

231311413331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 231311413331 - 2² = 231311413327 is a prime.

It is a super-2 number, since 2×231311413331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231311413331.

It is not an unprimeable number, because it can be changed into a prime (231311413337) 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, 1122870836 + ... + 1122871041.

It is an arithmetic number, because the mean of its divisors is an integer number (58389288828).

Almost surely, 2^231311413331 is an apocalyptic number.

231311413331 is a deficient number, since it is larger than the sum of its proper divisors (2245741981).

231311413331 is a wasteful number, since it uses less digits than its factorization.

231311413331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2245741980.

The product of its digits is 1944, while the sum is 26.

Adding to 231311413331 its reverse (133314113132), we get a palindrome (364625526463).

The spelling of 231311413331 in words is "two hundred thirty-one billion, three hundred eleven million, four hundred thirteen thousand, three hundred thirty-one".