3131232231 has 8 divisors (see below), whose sum is σ = 4191222384. Its totient is φ = 2079365120.

The previous prime is 3131232217. The next prime is 3131232253. The reversal of 3131232231 is 1322321313.

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 3131232231 - 2³¹ = 983748583 is a prime.

It is a super-2 number, since 2×3131232231² = 19609230568906474722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3131232198 and 3131232207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131232211) 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, 2029860 + ... + 2031401.

It is an arithmetic number, because the mean of its divisors is an integer number (523902798).

Almost surely, 2^3131232231 is an apocalyptic number.

3131232231 is a deficient number, since it is larger than the sum of its proper divisors (1059990153).

3131232231 is a wasteful number, since it uses less digits than its factorization.

3131232231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4061521.

The product of its digits is 648, while the sum is 21.

The square root of 3131232231 is about 55957.4144416984. The cubic root of 3131232231 is about 1462.9801252753.

Adding to 3131232231 its reverse (1322321313), we get a palindrome (4453553544).

The spelling of 3131232231 in words is "three billion, one hundred thirty-one million, two hundred thirty-two thousand, two hundred thirty-one".