331132229 has 2 divisors, whose sum is σ = 331132230. Its totient is φ = 331132228.

The previous prime is 331132211. The next prime is 331132253. The reversal of 331132229 is 922231133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190164100 + 140968129 = 13790^2 + 11873^2 .

It is a cyclic number.

It is not a de Polignac number, because 331132229 - 2²⁰ = 330083653 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 331132198 and 331132207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331132259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165566114 + 165566115.

It is an arithmetic number, because the mean of its divisors is an integer number (165566115).

Almost surely, 2^331132229 is an apocalyptic number.

It is an amenable number.

331132229 is a deficient number, since it is larger than the sum of its proper divisors (1).

331132229 is an equidigital number, since it uses as much as digits as its factorization.

331132229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 26.

The square root of 331132229 is about 18197.0390173786. The cubic root of 331132229 is about 691.8317422287.

The spelling of 331132229 in words is "three hundred thirty-one million, one hundred thirty-two thousand, two hundred twenty-nine".