312203220143 has 4 divisors (see below), whose sum is σ = 314007863208. Its totient is φ = 310398577080.

The previous prime is 312203220139. The next prime is 312203220179. The reversal of 312203220143 is 341022302213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 341022302213 = 5801 ⋅58786813.

It is a cyclic number.

It is not a de Polignac number, because 312203220143 - 2² = 312203220139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312203220443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 902321273 + ... + 902321618.

It is an arithmetic number, because the mean of its divisors is an integer number (78501965802).

Almost surely, 2^312203220143 is an apocalyptic number.

312203220143 is a deficient number, since it is larger than the sum of its proper divisors (1804643065).

312203220143 is a wasteful number, since it uses less digits than its factorization.

312203220143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804643064.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 312203220143 its reverse (341022302213), we get a palindrome (653225522356).

The spelling of 312203220143 in words is "three hundred twelve billion, two hundred three million, two hundred twenty thousand, one hundred forty-three".