31313123233020 has 72 divisors (see below), whose sum is σ = 95005033403280. Its totient is φ = 8348241542400.

The previous prime is 31313123232977. The next prime is 31313123233027. The reversal of 31313123233020 is 2033232131313.

31313123233020 is a `hidden beast` number, since 3 + 1 + 3 + 1 + 31 + 2 + 323 + 302 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31313123233027) 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, 19265281 + ... + 20827320.

Almost surely, 2^{31313123233020} is an apocalyptic number.

31313123233020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31313123233020 is an abundant number, since it is smaller than the sum of its proper divisors (63691910170260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31313123233020 is a wasteful number, since it uses less digits than its factorization.

31313123233020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40096955 (or 40096950 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 27.

Adding to 31313123233020 its reverse (2033232131313), we get a palindrome (33346355364333).

The spelling of 31313123233020 in words is "thirty-one trillion, three hundred thirteen billion, one hundred twenty-three million, two hundred thirty-three thousand, twenty".