31203131230 has 16 divisors (see below), whose sum is σ = 56226111120. Its totient is φ = 12467813632.

The previous prime is 31203131207. The next prime is 31203131237. The reversal of 31203131230 is 3213130213.

It is a junction number, because it is equal to n+sod(n) for n = 31203131198 and 31203131207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31203131237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1670104 + ... + 1688683.

It is an arithmetic number, because the mean of its divisors is an integer number (3514131945).

Almost surely, 2^31203131230 is an apocalyptic number.

31203131230 is a deficient number, since it is larger than the sum of its proper divisors (25022979890).

31203131230 is a wasteful number, since it uses less digits than its factorization.

31203131230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3359723.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31203131230 its reverse (3213130213), we get a palindrome (34416261443).

The spelling of 31203131230 in words is "thirty-one billion, two hundred three million, one hundred thirty-one thousand, two hundred thirty".