33131429 has 2 divisors, whose sum is σ = 33131430. Its totient is φ = 33131428.

The previous prime is 33131393. The next prime is 33131443. The reversal of 33131429 is 92413133.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32467204 + 664225 = 5698^2 + 815^2 .

It is a cyclic number.

It is not a de Polignac number, because 33131429 - 2⁸ = 33131173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 33131398 and 33131407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33131489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16565714 + 16565715.

It is an arithmetic number, because the mean of its divisors is an integer number (16565715).

Almost surely, 2^33131429 is an apocalyptic number.

It is an amenable number.

33131429 is a deficient number, since it is larger than the sum of its proper divisors (1).

33131429 is an equidigital number, since it uses as much as digits as its factorization.

33131429 is an odious number, because the sum of its binary digits is odd.

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

The square root of 33131429 is about 5755.9907053434. The cubic root of 33131429 is about 321.1786901833.

The spelling of 33131429 in words is "thirty-three million, one hundred thirty-one thousand, four hundred twenty-nine".