311203032223 has 4 divisors (see below), whose sum is σ = 329509092960. Its totient is φ = 292896971488.

The previous prime is 311203032211. The next prime is 311203032253. The reversal of 311203032223 is 322230302113.

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 311203032223 - 2¹³ = 311203024031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311203032194 and 311203032203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311203032253) 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, 9153030343 + ... + 9153030376.

It is an arithmetic number, because the mean of its divisors is an integer number (82377273240).

Almost surely, 2^311203032223 is an apocalyptic number.

311203032223 is a deficient number, since it is larger than the sum of its proper divisors (18306060737).

311203032223 is a wasteful number, since it uses less digits than its factorization.

311203032223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18306060736.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 311203032223 its reverse (322230302113), we get a palindrome (633433334336).

The spelling of 311203032223 in words is "three hundred eleven billion, two hundred three million, thirty-two thousand, two hundred twenty-three".