31313000211231 has 16 divisors (see below), whose sum is σ = 41794875532800. Its totient is φ = 20853232784160.

The previous prime is 31313000211223. The next prime is 31313000211271. The reversal of 31313000211231 is 13211200031313.

It is a happy number.

It is not a de Polignac number, because 31313000211231 - 2³ = 31313000211223 is a prime.

It is a super-2 number, since 2×31313000211231² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31313000211198 and 31313000211207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31313000211211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34813041 + ... + 35701173.

It is an arithmetic number, because the mean of its divisors is an integer number (2612179720800).

Almost surely, 2^{31313000211231} is an apocalyptic number.

31313000211231 is a deficient number, since it is larger than the sum of its proper divisors (10481875321569).

31313000211231 is a wasteful number, since it uses less digits than its factorization.

31313000211231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900566.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 31313000211231 its reverse (13211200031313), we get a palindrome (44524200242544).

The spelling of 31313000211231 in words is "thirty-one trillion, three hundred thirteen billion, two hundred eleven thousand, two hundred thirty-one".