31201231230 has 144 divisors (see below), whose sum is σ = 90678496896. Its totient is φ = 7432439040.

The previous prime is 31201231213. The next prime is 31201231297. The reversal of 31201231230 is 3213210213.

31201231230 is a `hidden beast` number, since 3 + 1 + 201 + 231 + 230 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 438424 + ... + 504596.

It is an arithmetic number, because the mean of its divisors is an integer number (629711784).

Almost surely, 2^31201231230 is an apocalyptic number.

31201231230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31201231230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45339248448).

31201231230 is an abundant number, since it is smaller than the sum of its proper divisors (59477265666).

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

31201231230 is a wasteful number, since it uses less digits than its factorization.

31201231230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66243 (or 66227 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31201231230 its reverse (3213210213), we get a palindrome (34414441443).

The spelling of 31201231230 in words is "thirty-one billion, two hundred one million, two hundred thirty-one thousand, two hundred thirty".