3131332231 has 2 divisors, whose sum is σ = 3131332232. Its totient is φ = 3131332230.

The previous prime is 3131332223. The next prime is 3131332249. The reversal of 3131332231 is 1322331313.

3131332231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3131332231 - 2³ = 3131332223 is a prime.

It is a super-2 number, since 2×3131332231² = 19610483081798874722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3131332261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565666115 + 1565666116.

It is an arithmetic number, because the mean of its divisors is an integer number (1565666116).

Almost surely, 2^3131332231 is an apocalyptic number.

3131332231 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131332231 is an equidigital number, since it uses as much as digits as its factorization.

3131332231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 22.

The square root of 3131332231 is about 55958.3079712030. The cubic root of 3131332231 is about 1462.9956991713.

Adding to 3131332231 its reverse (1322331313), we get a palindrome (4453663544).

The spelling of 3131332231 in words is "three billion, one hundred thirty-one million, three hundred thirty-two thousand, two hundred thirty-one".