31131131230 has 16 divisors (see below), whose sum is σ = 56095602624. Its totient is φ = 12439215520.

The previous prime is 31131131111. The next prime is 31131131249. The reversal of 31131131230 is 3213113113.

It is a junction number, because it is equal to n+sod(n) for n = 31131131198 and 31131131207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1644742 + ... + 1663561.

It is an arithmetic number, because the mean of its divisors is an integer number (3505975164).

Almost surely, 2^31131131230 is an apocalyptic number.

31131131230 is a deficient number, since it is larger than the sum of its proper divisors (24964471394).

31131131230 is a wasteful number, since it uses less digits than its factorization.

31131131230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3309251.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 31131131230 its reverse (3213113113), we get a palindrome (34344244343).

The spelling of 31131131230 in words is "thirty-one billion, one hundred thirty-one million, one hundred thirty-one thousand, two hundred thirty".