31131203132 has 12 divisors (see below), whose sum is σ = 54895481256. Its totient is φ = 15446779920.

The previous prime is 31131203039. The next prime is 31131203143. The reversal of 31131203132 is 23130213113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29704823 + ... + 29705870.

It is an arithmetic number, because the mean of its divisors is an integer number (4574623438).

Almost surely, 2^31131203132 is an apocalyptic number.

It is an amenable number.

31131203132 is a deficient number, since it is larger than the sum of its proper divisors (23764278124).

31131203132 is a wasteful number, since it uses less digits than its factorization.

31131203132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59410828 (or 59410826 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31131203132 its reverse (23130213113), we get a palindrome (54261416245).

The spelling of 31131203132 in words is "thirty-one billion, one hundred thirty-one million, two hundred three thousand, one hundred thirty-two".