2312111431 has 4 divisors (see below), whose sum is σ = 2642413072. Its totient is φ = 1981809792.

The previous prime is 2312111423. The next prime is 2312111437. The reversal of 2312111431 is 1341112132.

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 2312111431 - 2³ = 2312111423 is a prime.

It is a super-2 number, since 2×2312111431² = 10691718538721735522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2312111399 and 2312111408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2312111437) 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, 165150810 + ... + 165150823.

It is an arithmetic number, because the mean of its divisors is an integer number (660603268).

Almost surely, 2^2312111431 is an apocalyptic number.

2312111431 is a deficient number, since it is larger than the sum of its proper divisors (330301641).

2312111431 is an equidigital number, since it uses as much as digits as its factorization.

2312111431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330301640.

The product of its digits is 144, while the sum is 19.

The square root of 2312111431 is about 48084.4198363670. The cubic root of 2312111431 is about 1322.3190468576.

Adding to 2312111431 its reverse (1341112132), we get a palindrome (3653223563).

The spelling of 2312111431 in words is "two billion, three hundred twelve million, one hundred eleven thousand, four hundred thirty-one".