31031211323230 has 32 divisors (see below), whose sum is σ = 58289260829184. Its totient is φ = 11871884260896.

The previous prime is 31031211323227. The next prime is 31031211323239. The reversal of 31031211323230 is 3232311213013.

It is a junction number, because it is equal to n+sod(n) for n = 31031211323195 and 31031211323204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31031211323239) 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, 2311504 + ... + 8210083.

It is an arithmetic number, because the mean of its divisors is an integer number (1821539400912).

Almost surely, 2^{31031211323230} is an apocalyptic number.

31031211323230 is a deficient number, since it is larger than the sum of its proper divisors (27258049505954).

31031211323230 is a wasteful number, since it uses less digits than its factorization.

31031211323230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10534440.

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

Adding to 31031211323230 its reverse (3232311213013), we get a palindrome (34263522536243).

The spelling of 31031211323230 in words is "thirty-one trillion, thirty-one billion, two hundred eleven million, three hundred twenty-three thousand, two hundred thirty".