2131231229 has 2 divisors, whose sum is σ = 2131231230. Its totient is φ = 2131231228.

The previous prime is 2131231213. The next prime is 2131231241. The reversal of 2131231229 is 9221321312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1711063225 + 420168004 = 41365^2 + 20498^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131231229 - 2⁴ = 2131231213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2131231198 and 2131231207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131231279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065615614 + 1065615615.

It is an arithmetic number, because the mean of its divisors is an integer number (1065615615).

Almost surely, 2^2131231229 is an apocalyptic number.

It is an amenable number.

2131231229 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131231229 is an equidigital number, since it uses as much as digits as its factorization.

2131231229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

The square root of 2131231229 is about 46165.2599797727. The cubic root of 2131231229 is about 1286.8962156407.

The spelling of 2131231229 in words is "two billion, one hundred thirty-one million, two hundred thirty-one thousand, two hundred twenty-nine".