31132331231 has 8 divisors (see below), whose sum is σ = 32772942720. Its totient is φ = 29491926552.

The previous prime is 31132331213. The next prime is 31132331233. The reversal of 31132331231 is 13213323113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31132331231 - 2¹⁴ = 31132314847 is a prime.

It is a super-2 number, since 2×31132331231² (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 = 31132331197 and 31132331206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31132331233) 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 7 ways as a sum of consecutive naturals, for example, 329396 + ... + 413238.

It is an arithmetic number, because the mean of its divisors is an integer number (4096617840).

Almost surely, 2^31132331231 is an apocalyptic number.

31132331231 is a deficient number, since it is larger than the sum of its proper divisors (1640611489).

31132331231 is a wasteful number, since it uses less digits than its factorization.

31132331231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103405.

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

Adding to 31132331231 its reverse (13213323113), we get a palindrome (44345654344).

The spelling of 31132331231 in words is "thirty-one billion, one hundred thirty-two million, three hundred thirty-one thousand, two hundred thirty-one".