311232020130031 has 32 divisors (see below), whose sum is σ = 417880285659648. Its totient is φ = 223861943859840.

The previous prime is 311232020130013. The next prime is 311232020130107. The reversal of 311232020130031 is 130031020232113.

It is not a de Polignac number, because 311232020130031 - 2⁷ = 311232020129903 is a prime.

It is a super-2 number, since 2×311232020130031² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 311232020129984 and 311232020130011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311232020130431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202755696 + ... + 204284938.

It is an arithmetic number, because the mean of its divisors is an integer number (13058758926864).

Almost surely, 2^{311232020130031} is an apocalyptic number.

311232020130031 is a deficient number, since it is larger than the sum of its proper divisors (106648265529617).

311232020130031 is a wasteful number, since it uses less digits than its factorization.

311232020130031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1732591.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 311232020130031 its reverse (130031020232113), we get a palindrome (441263040362144).

The spelling of 311232020130031 in words is "three hundred eleven trillion, two hundred thirty-two billion, twenty million, one hundred thirty thousand, thirty-one".