312440024243 has 4 divisors (see below), whose sum is σ = 314825062728. Its totient is φ = 310054985760.

The previous prime is 312440024189. The next prime is 312440024279. The reversal of 312440024243 is 342420044213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342420044213 = 13 ⋅26340003401.

It is a cyclic number.

It is not a de Polignac number, because 312440024243 - 2²⁸ = 312171588787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312440026243) 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, 1192519046 + ... + 1192519307.

It is an arithmetic number, because the mean of its divisors is an integer number (78706265682).

Almost surely, 2^312440024243 is an apocalyptic number.

312440024243 is a deficient number, since it is larger than the sum of its proper divisors (2385038485).

312440024243 is a wasteful number, since it uses less digits than its factorization.

312440024243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2385038484.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 312440024243 its reverse (342420044213), we get a palindrome (654860068456).

The spelling of 312440024243 in words is "three hundred twelve billion, four hundred forty million, twenty-four thousand, two hundred forty-three".