2106431231 has 2 divisors, whose sum is σ = 2106431232. Its totient is φ = 2106431230.

The previous prime is 2106431221. The next prime is 2106431237. The reversal of 2106431231 is 1321346012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2106431231 - 2⁶ = 2106431167 is a prime.

It is a super-2 number, since 2×2106431231² = 8874105061864350722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2106431197 and 2106431206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2106431237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1053215615 + 1053215616.

It is an arithmetic number, because the mean of its divisors is an integer number (1053215616).

Almost surely, 2^2106431231 is an apocalyptic number.

2106431231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2106431231 is an equidigital number, since it uses as much as digits as its factorization.

2106431231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 2106431231 is about 45895.8737905708. The cubic root of 2106431231 is about 1281.8850868043.

Adding to 2106431231 its reverse (1321346012), we get a palindrome (3427777243).

The spelling of 2106431231 in words is "two billion, one hundred six million, four hundred thirty-one thousand, two hundred thirty-one".