311302220133031 has 24 divisors (see below), whose sum is σ = 334173164509184. Its totient is φ = 289910025210240.

The previous prime is 311302220133011. The next prime is 311302220133131. The reversal of 311302220133031 is 130331022203113.

It is not a de Polignac number, because 311302220133031 - 2⁴³ = 302506127110823 is a prime.

It is a super-2 number, since 2×311302220133031² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311302220132987 and 311302220133005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311302220133011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32395426 + ... + 40890928.

Almost surely, 2^{311302220133031} is an apocalyptic number.

311302220133031 is a deficient number, since it is larger than the sum of its proper divisors (22870944376153).

311302220133031 is a wasteful number, since it uses less digits than its factorization.

311302220133031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8496871 (or 8496854 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 311302220133031 its reverse (130331022203113), we get a palindrome (441633242336144).

The spelling of 311302220133031 in words is "three hundred eleven trillion, three hundred two billion, two hundred twenty million, one hundred thirty-three thousand, thirty-one".