32131313231 has 4 divisors (see below), whose sum is σ = 33822435000. Its totient is φ = 30440191464.

The previous prime is 32131313171. The next prime is 32131313239. The reversal of 32131313231 is 13231313123.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32131313231 is a prime.

It is a super-2 number, since 2×32131313231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 32131313197 and 32131313206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32131313239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 845560856 + ... + 845560893.

It is an arithmetic number, because the mean of its divisors is an integer number (8455608750).

Almost surely, 2^32131313231 is an apocalyptic number.

32131313231 is a deficient number, since it is larger than the sum of its proper divisors (1691121769).

32131313231 is a wasteful number, since it uses less digits than its factorization.

32131313231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691121768.

The product of its digits is 972, while the sum is 23.

Adding to 32131313231 its reverse (13231313123), we get a palindrome (45362626354).

The spelling of 32131313231 in words is "thirty-two billion, one hundred thirty-one million, three hundred thirteen thousand, two hundred thirty-one".